[Silabs] Adds fix for WF200 firmware error 15

[LeelakumarPS]

• [Silabs] Adds fix for WF200 firmware error 15
• Reduced the spi-bitrate from 16MHz to 10MHz
• Tested manually and automated

[github-actions]

PR #26323: Size comparison from fa505f6 to f1666f3

Full report (2 builds for cc32xx, mbed)

platform	target	config	section	fa505f6	f1666f3	change	% change
cc32xx	lock	CC3235SF_LAUNCHXL		0	0	0	0.0
			(read only)	604042	604042	0	0.0
			(read/write)	204156	204156	0	0.0
			.ARM.attributes	44	44	0	0.0
			.ARM.exidx	8	8	0	0.0
			.bss	197568	197568	0	0.0
			.comment	206	206	0	0.0
			.data	1468	1468	0	0.0
			.debug_abbrev	956764	956764	0	0.0
			.debug_aranges	103240	103240	0	0.0
			.debug_frame	349432	349432	0	0.0
			.debug_info	19559510	19559510	0	0.0
			.debug_line	2687404	2687404	0	0.0
			.debug_line_str	513	513	0	0.0
			.debug_loc	33340	33340	0	0.0
			.debug_loclists	1515630	1515630	0	0.0
			.debug_ranges	4984	4984	0	0.0
			.debug_rnglists	95966	95966	0	0.0
			.debug_str	3082308	3082308	0	0.0
			.ramVecs	780	780	0	0.0
			.resetVecs	64	64	0	0.0
			.rodata	104282	104282	0	0.0
			.shstrtab	265	265	0	0.0
			.stack	2048	2048	0	0.0
			.strtab	479192	479192	0	0.0
			.symtab	286736	286736	0	0.0
			.text	497636	497636	0	0.0
mbed	lock-app	CY8CPROTO_062_4343W+release	(read only)	6224	6224	0	0.0
			(read/write)	2496168	2496168	0	0.0
			.bss	216296	216296	0	0.0
			.data	5144	5144	0	0.0
			.text	1458852	1458852	0	0.0