net: rtl8192cu: Fix implicit fallthrough warnings

These warnings appear with GCC 7.3.0 from toolchains.bootlin.com:

../drivers/net/wireless/realtek/rtl8192cu/core/rtw_mlme_ext.c: In function ‘mgt_dispatcher’:
../drivers/net/wireless/realtek/rtl8192cu/core/rtw_mlme_ext.c:734:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
    if(check_fwstate(pmlmepriv, WIFI_AP_STATE) == _TRUE)
      ^
../drivers/net/wireless/realtek/rtl8192cu/core/rtw_mlme_ext.c:739:3: note: here
   case WIFI_ASSOCREQ:
   ^~~~
../drivers/net/wireless/realtek/rtl8192cu/hal/rtl8192c/rtl8192c_phycfg.c: In function ‘phy_TxPwrIdxToDbm’:
../drivers/net/wireless/realtek/rtl8192cu/hal/rtl8192c/rtl8192c_phycfg.c:2365:10: warning: this statement may fall through [-Wimplicit-fallthrough=]
   Offset = -8;
   ~~~~~~~^~~~
../drivers/net/wireless/realtek/rtl8192cu/hal/rtl8192c/rtl8192c_phycfg.c:2366:2: note: here
  default:
  ^~~~~~~
../drivers/net/wireless/realtek/rtl8192cu/hal/rtl8192c/usb/usb_halinit.c: In function ‘GetHwReg8192CU’:
../drivers/net/wireless/realtek/rtl8192cu/hal/rtl8192c/usb/usb_halinit.c:5694:20: warning: this statement may fall through [-Wimplicit-fallthrough=]
    *((u16 *)(val)) = pHalData->BasicRateSet;
    ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
../drivers/net/wireless/realtek/rtl8192cu/hal/rtl8192c/usb/usb_halinit.c:5695:3: note: here
   case HW_VAR_TXPAUSE:
   ^~~~
../drivers/net/wireless/realtek/rtl8192cu/os_dep/linux/ioctl_linux.c: In function ‘set_group_key’:
../drivers/net/wireless/realtek/rtl8192cu/os_dep/linux/ioctl_linux.c:7383:11: warning: this statement may fall through [-Wimplicit-fallthrough=]
    keylen = 16;
    ~~~~~~~^~~~
../drivers/net/wireless/realtek/rtl8192cu/os_dep/linux/ioctl_linux.c:7384:3: note: here
   default:
   ^~~~~~~
../drivers/net/wireless/realtek/rtl8192cu/os_dep/linux/ioctl_cfg80211.c: In function ‘set_group_key’:
../drivers/net/wireless/realtek/rtl8192cu/os_dep/linux/ioctl_cfg80211.c:822:11: warning: this statement may fall through [-Wimplicit-fallthrough=]
    keylen = 16;
    ~~~~~~~^~~~
../drivers/net/wireless/realtek/rtl8192cu/os_dep/linux/ioctl_cfg80211.c:823:3: note: here
   default:
   ^~~~~~~

They all appear to be fall positives, label them as such.

Signed-off-by: Nathan Chancellor <[email protected]>

drivers/net/wireless/realtek/rtl8192cu/core/rtw_mlme_ext.c

@@ -733,9 +733,10 @@ void mgt_dispatcher(_adapter *padapter, union recv_frame *precv_frame)
 		case WIFI_AUTH:
 			if(check_fwstate(pmlmepriv, WIFI_AP_STATE) == _TRUE)
 				ptable->func = &OnAuth;
+				/* falls through */
 			else
 				ptable->func = &OnAuthClient;
-			//pass through
+				/* falls through */
 		case WIFI_ASSOCREQ:
 		case WIFI_REASSOCREQ:
 			_mgt_dispatcher(padapter, ptable, precv_frame);

drivers/net/wireless/realtek/rtl8192cu/hal/rtl8192c/rtl8192c_phycfg.c

@@ -2360,9 +2360,6 @@ phy_TxPwrIdxToDbm(
 		Offset = -7;
 		break;
 
-	case WIRELESS_MODE_G:
-	case WIRELESS_MODE_N_24G:
-		Offset = -8;
 	default:
 		Offset = -8;
 		break;

drivers/net/wireless/realtek/rtl8192cu/hal/rtl8192c/usb/usb_halinit.c

@@ -5692,6 +5692,7 @@ _func_enter_;
 	{
 		case HW_VAR_BASIC_RATE:
 			*((u16 *)(val)) = pHalData->BasicRateSet;
+			/* falls through */
 		case HW_VAR_TXPAUSE:
 			val[0] = rtw_read8(Adapter, REG_TXPAUSE);
 			break;

drivers/net/wireless/realtek/rtl8192cu/os_dep/linux/ioctl_cfg80211.c

@@ -816,12 +816,9 @@ static int set_group_key(_adapter *padapter, u8 *key, u8 alg, int keyid)
 		case _WEP104_:
 			keylen = 13;
 			break;
-		case _TKIP_:
-		case _TKIP_WTMIC_:
-		case _AES_:
-			keylen = 16;
 		default:
 			keylen = 16;
+			break;
 	}
 
 	_rtw_memcpy(&(psetkeyparm->key[0]), key, keylen);

drivers/net/wireless/realtek/rtl8192cu/os_dep/linux/ioctl_linux.c

@@ -7377,10 +7377,6 @@ static int set_group_key(_adapter *padapter, u8 *key, u8 alg, int keyid)
 		case _WEP104_:
 			keylen = 13;
 			break;
-		case _TKIP_:
-		case _TKIP_WTMIC_:
-		case _AES_:
-			keylen = 16;
 		default:
 			keylen = 16;
 	}