[M] Change in coreboot[master]: mb/google/rex: Configure ISH GPIO's based on FW_CONFIG

[Li1 Feng (Code Review)]

Attention is currently required from: Bernardo Perez Priego, Jamie Ryu, Jay Patel, Kapil Porwal, Subrata Banik, Tarun Tuli, Wonkyu Kim.

Li1 Feng has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/75525?usp=email )

Change subject: mb/google/rex: Configure ISH GPIO's based on FW_CONFIG
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Patch Set 6:

(3 comments)

File src/mainboard/google/rex/variants/rex0/fw_config.c:

https://review.coreboot.org/c/coreboot/+/75525/comment/18e7988b_51c3796f :
PS6, Line 50: net NC is not present in the given design
SOC_ISH_ACCEL_INT_L

https://review.coreboot.org/c/coreboot/+/75525/comment/ab5a3c82_d91b8ce8 :
PS6, Line 52: net NC is not present in the given design
SOC_ISH_ALS_INT_L

https://review.coreboot.org/c/coreboot/+/75525/comment/f6282fe4_de2f61da :
PS6, Line 58: static const struct pad_config ish_gpp_pads_board2[] = {
Those two are also needed in proto 2. 
    PAD_CFG_NF(GPP_B08, NONE, DEEP, NF4), 
    PAD_CFG_NF(GPP_F22, NONE, DEEP, NF8),