[Telink] Use project related overlays.

[andriy-bilynskyy]

Change overview

Use project related overlays

Testing

Tested manually with chip-tool.

Steps:

• Run: $ chip-tool pairing ble-thread <...>
• Wait till success

[github-actions]

PR #25619: Size comparison from bdee2ef to 6647b3a

Full report (1 build for cc32xx)

platform	target	config	section	bdee2ef	6647b3a	change	% change
cc32xx	lock	CC3235SF_LAUNCHXL		0	0	0	0.0
			(read only)	644945	644945	0	0.0
			(read/write)	203848	203848	0	0.0
			.ARM.attributes	44	44	0	0.0
			.ARM.exidx	8	8	0	0.0
			.bss	197248	197248	0	0.0
			.comment	194	194	0	0.0
			.data	1480	1480	0	0.0
			.debug_abbrev	930293	930293	0	0.0
			.debug_aranges	87376	87376	0	0.0
			.debug_frame	300236	300236	0	0.0
			.debug_info	20275029	20275029	0	0.0
			.debug_line	2660914	2660914	0	0.0
			.debug_loc	2804674	2804674	0	0.0
			.debug_ranges	283248	283248	0	0.0
			.debug_str	3026077	3026077	0	0.0
			.ramVecs	780	780	0	0.0
			.resetVecs	64	64	0	0.0
			.rodata	105921	105921	0	0.0
			.shstrtab	232	232	0	0.0
			.stab	204	204	0	0.0
			.stabstr	441	441	0	0.0
			.stack	2048	2048	0	0.0
			.strtab	379152	379152	0	0.0
			.symtab	256848	256848	0	0.0
			.text	536904	536904	0	0.0

[andriy-bilynskyy]

Please review this PR it touches only Telink vendor. In Zephyr hardware configuration should be changed using .dts project overlay not modifying original Zephyr board .dts. From our side we are trying to get rid of special Zephyr branch for Matter project.

[bzbarsky-apple]

Fast-tracking platform-specific change with platform owner review.