sb/intel/bd82x6x: Add and use more RCBA defines

Taken from
"Intel 6 Series Chipset and Intel C200 Series Chipset"
Document Number: 324645-006 and
"Intel 5 Series Chipset and Intel 3400 Series Chipset"
Document Number: 322169-004 and
"Intel 6 Series Chipset"
Document Number: 324645-001.

UPDCR was found in GNU/Linux's drivers/pci/quirks.c.
DMC2 was guessed as it's close to DMC and defined for 5 series chipset.

Test:
Run BUILD_TIMELESS=1 and compared the coreboot.roms, no differences.

Change-Id: I4fed7c38078cabd4308424c7547416e87c9e6fa7
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34334
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
diff --git a/src/southbridge/intel/bd82x6x/pcie.c b/src/southbridge/intel/bd82x6x/pcie.c
index 0bc75b5..97306e4 100644
--- a/src/southbridge/intel/bd82x6x/pcie.c
+++ b/src/southbridge/intel/bd82x6x/pcie.c
@@ -114,7 +114,7 @@
 	/* Adjust ASPM L1 exit latency */
 	reg32 = pci_read_config32(dev, 0x4c);
 	reg32 &= ~((1 << 17) | (1 << 16) | (1 << 15));
-	if (RCBA32(0x2320) & (1 << 16)) {
+	if (RCBA32(CIR9) & (1 << 16)) {
 		/* If RCBA+2320[15]=1 set ASPM L1 to 8-16us */
 		reg32 |= (1 << 17);
 	} else {