[S] Change in coreboot[main]: mb/google/brya: Optimize CBFE backed option API

[Subrata Banik (Code Review)]

Attention is currently required from: Dinesh Gehlot, Eric Lai, Jayvik Desai, Julius Werner, Kapil Porwal, Nick Vaccaro.

Subrata Banik has posted comments on this change by Kapil Porwal. ( https://review.coreboot.org/c/coreboot/+/87286?usp=email )

Change subject: mb/google/brya: Optimize CBFE backed option API
......................................................................

Patch Set 4:

(2 comments)

File src/mainboard/google/brya/common.c:

https://review.coreboot.org/c/coreboot/+/87286/comment/f3ed56e9_26fe6848?usp... :
PS4, Line 7: valid_options
valid_cbfs_options

https://review.coreboot.org/c/coreboot/+/87286/comment/19155bf6_f4a35c77?usp... :
PS4, Line 7: static const char * const valid_options[] = {
           : 	"fsp_pcd_debug_level",
           : 	"fsp_mrc_debug_level"
           : };
these options are only for PTL onwards