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 constitution device and verify that
the device suspends to S0ix.
Change-Id: Ia367911d6d55b1f769c1660a6f42118988975621
Signed-off-by: Pranava Y N <pranavayn@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/86686
Reviewed-by: Kapil Porwal <kapilporwal@google.com>
Reviewed-by: Eric Lai <ericllai@google.com>
Reviewed-by: Subrata Banik <subratabanik@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
1ec46a45c4