mainboard/intel/adlrvp: Enable PCH PCIe device over x1 slot

List of changes:
1. Enable Root Port 8 aka 0:0x1c:7
2. Assign free running clock for RP8
3. Apply W/A to get card detected on x1 slot
- Drive OEB 7:GPP_A7 and OEB 6:GPP_E5 low

TEST=Able to detect PCIe SD card over x1 slot
localhost ~ # dmesg | grep mmc
[ 3.643755] mmc0: SDHCI controller on PCI [0000:02:00.0] using ADMA
[ 3.825201] mmc0: new ultra high speed DDR50 SDHC card at address 17f8
[ 3.835452] mmcblk0: mmc0:17f8 SE16G 14.4 GiB
[ 3.849158] mmcblk0: p1

Change-Id: Ibea37b8de4dd020ff0108ec90ea6f8bcfaa4fb17
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/48080
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: V Sowmya <v.sowmya@intel.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

0 files changed, 0 insertions, 0 deletions