[M] Change in coreboot[main]: mb/google/fatcat: Add ISH support with FW_CONFIG toggle

[Kapil Porwal (Code Review)]

Attention is currently required from: Bora Guvendik, Li1 Feng, Pranava Y N, Subrata Banik, YH Lin.

Kapil Porwal has posted comments on this change by Subrata Banik. ( https://review.coreboot.org/c/coreboot/+/84998?usp=email )

Change subject: mb/google/fatcat: Add ISH support with FW_CONFIG toggle
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Patch Set 3:

(1 comment)

File src/mainboard/google/fatcat/variants/fatcat/fw_config.c:

https://review.coreboot.org/c/coreboot/+/84998/comment/4e107271_c3eccccf?usp... :
PS3, Line 457: 	/* GPP_D05:     NC */
             : 	PAD_NC(GPP_D05, NONE),
             : 	/* GPP_D06:     NC */
             : 	PAD_NC(GPP_D06, NONE),
             : 	/* GPP_E05:     NC */
             : 	PAD_NC(GPP_E05, NONE),
Can we keep these as default case in gpio.c itself and enable ISH GPIOs when ISH is enabled?