[S] Change in coreboot[main]: ec/google/chromeec: Add is_battery_present()

[Sowmya Aralguppe (Code Review)]

Attention is currently required from: Caveh Jalali, Dinesh Gehlot, Eric Herrmann, Forest Mittelberg, Kapil Porwal, Karthik Ramasubramanian, Keith Short, Nick Vaccaro, Rishika Raj, Shelly Chang, Subrata Banik.

Sowmya Aralguppe has posted comments on this change by Sowmya Aralguppe. ( https://review.coreboot.org/c/coreboot/+/83735?usp=email )

Change subject: ec/google/chromeec: Add is_battery_present()
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Patch Set 7:

(1 comment)

File src/ec/google/chromeec/ec.h:

https://review.coreboot.org/c/coreboot/+/83735/comment/1e45fbed_9905af4b?usp... :
PS4, Line 433: google_chromeec_is_battery_present
> My preference is to wait until we make the decision. […]

Dynamically updating the PL4 is for Battery connected but not charged beyond critical threshold(1% with adaptor and 4% without adaptor) case which will be handled separately.
This is only for no battery scenario where it is ok for PL4 to be less and not updated later after system boots up
In earlier cases - - https://review.coreboot.org/c/coreboot/+/83406 (abandoned patch) we were trying to boot up with psys PL value changes which was not working for 45watts sku2 for no battery use case also
So this solution is for no battery scenario only .(sorry few more details -in parallel, I am working for a clean solution for dead battery scenario - I have looped in hardware team, PNP team and probably reach out to OS team to write into MSR 0x601 - once the battery is charged beyond critical threshold - I will keep updating on partner bug - which will remain open till we have a solution for dead battery case also)