[S] Change in coreboot[master]: soc/intel/common/block/pcie/rtd3: Skip Power On if _STA returns 1

[Kane Chen (Code Review)]

Attention is currently required from: Subrata Banik, Sridhar Siricilla, Nick Vaccaro.

Hello Subrata Banik, Sridhar Siricilla, Nick Vaccaro,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/69189

to look at the new patch set (#2).

Change subject: soc/intel/common/block/pcie/rtd3: Skip Power On if _STA returns 1
......................................................................

soc/intel/common/block/pcie/rtd3: Skip Power On if _STA returns 1

RTD3,_ON method sometimes can create delays during system boot.
Even when the power is already up, kernel still tries to call _ON
method to power up device, but it's unnecessary.

RTD3._STA returns device power, so _ON method can check _STA and see
if the power on process can be skipped

BUG=b:249931687
TEST=system can boot to OS with RTD3 pcie storage and save ~80 ms on
     Crota. Suspend stress test passes 100 cycles

Change-Id: I296ce1b85417a5dbaca558511cd7fc51a3a38c84
Signed-off-by: Kane Chen 
---
M src/soc/intel/common/block/pcie/rtd3/rtd3.c
1 file changed, 43 insertions(+), 2 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/89/69189/2