Some SSDs block the CPU from reaching C10 during the S0ix suspend
without the RTD3 configuration. Add PCIe RTD3 support so NVMe gets
placed into D3 state when entering S0ix.
Enable and reset GPIOs are configured as per pin mapping in gpio.c.
BUG=b:391612392
TEST=Run suspend_stress_test on nova and verify that the device
suspends to S0ix.
Change-Id: Icb36285d0a12dcb098282b08ef794256af67b019
Signed-off-by: Pranava Y N <pranavayn@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/86649
Reviewed-by: Subrata Banik <subratabanik@google.com>
Reviewed-by: Eric Lai <ericllai@google.com>
Reviewed-by: Kapil Porwal <kapilporwal@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
28930e9c18