Change in coreboot[master]: mb/intel/shadowmountain: Disable GSPI1 interface connected to FPS

[Rizwan Qureshi (Code Review)]

Attention is currently required from: Maulik V Vaghela, Sridhar Siricilla, Meera Ravindranath, Subrata Banik, Balaji Manigandan.
Rizwan Qureshi has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/52186 )

Change subject: mb/intel/shadowmountain: Disable GSPI1 interface connected to FPS
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Patch Set 4:

(2 comments)

Commit Message:

https://review.coreboot.org/c/coreboot/+/52186/comment/96ecd801_d5deb3fe 
PS4, Line 9: The patch disables GSPI1 interface connected to fingerprint scanner.
why are we disabling it?

File src/mainboard/intel/shadowmountain/variants/baseboard/gpio.c:

https://review.coreboot.org/c/coreboot/+/52186/comment/e4dba568_1196a21b 
PS4, Line 41: PAD_CFG_GPO(GPP_A21, 1, DEEP),
if the intent is to disable FPS, please disable the power as well, there is an on board FPS driver as well which will consume power.