mb/intel/adlrvp: Make CLKSRC and CLKREQ proper for PCIE RP8
1. Make CLKSRC -> 7 and CLKREQ -> 6
2. CLK 6 is using free running CLK
3. Make LAN CLK 7 as unused as GbE is disable
TEST=Able to detect PCIE SD card on 0x1 slot.
Change-Id: I7fbde9492a0c59fc76931bfb7c9522d4f208ebb0
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/48449
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-by: V Sowmya <v.sowmya@intel.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>