projects/Amlogic: Reset uenv before applying new values. Allow to boo…

…t from NAND.

projects/Amlogic/install/aml_autoscript.src

@@ -1,3 +1,7 @@
-setenv bootcmd 'if mmcinfo; then if fatload mmc 0 ${loadaddr} kernel.img; then setenv bootargs ${bootargs} bootfromsd; bootm; fi; fi; run storeboot'
+defenv
+setenv bootfromnand 0
+setenv bootfromsd 'if test ${bootfromnand} = 1; then setenv bootfromnand 0; saveenv; exit; fi; if test ${reboot_mode} = switch_system; then exit; fi; if mmcinfo; then if fatload mmc 0 ${loadaddr} kernel.img; then setenv bootargs ${bootargs} bootfromsd; bootm; fi; fi'
+setenv bootcmd 'run bootfromsd; run storeboot'
 setenv cecconfig cecf
+setenv reboot_mode normal
 saveenv