[S] Change in coreboot[master]: mb/google/nissa/var/craask: avoid camera LED blinking during boot

[Jimmy Su (Code Review)]

Attention is currently required from: Tarun Tuli, Paul Menzel, Reka Norman, Tyler Wang, Eric Lai.

Jimmy Su has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/74728 )

Change subject: mb/google/nissa/var/craask: avoid camera LED blinking during boot
......................................................................

Patch Set 2:

(1 comment)

Patchset:

PS2:
> They are different driver bring me a question. […]

There has a mechanism to handle two driver using the same power rails. 
It has a counter to calculate +/-1 to decide the power rail is on/off status. 
Sensor & VCM could be enabled while CCA is opened, but there has some time difference between two driver control. 
This is why I need to add D15 to VCM power control.