nb/intel/gm45: Define and use MMCONF_BUS_NUMBER

Change-Id: I635f3615f566502f79bbd81f9f743ce63bba3b1a
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/49758
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/northbridge/intel/gm45/acpi/gm45.asl b/src/northbridge/intel/gm45/acpi/gm45.asl
index f13133d..7f64219 100644
--- a/src/northbridge/intel/gm45/acpi/gm45.asl
+++ b/src/northbridge/intel/gm45/acpi/gm45.asl
@@ -18,7 +18,7 @@
 		Memory32Fixed(ReadWrite, DEFAULT_MCHBAR,   0x00004000)
 		Memory32Fixed(ReadWrite, DEFAULT_DMIBAR,   0x00001000)
 		Memory32Fixed(ReadWrite, DEFAULT_EPBAR,    0x00001000)
-		Memory32Fixed(ReadWrite, CONFIG_MMCONF_BASE_ADDRESS, 0x04000000)
+		Memory32Fixed(ReadWrite, CONFIG_MMCONF_BASE_ADDRESS, CONFIG_MMCONF_LENGTH)
 		Memory32Fixed(ReadWrite, 0xfed20000, 0x00020000) // Misc ICH
 		Memory32Fixed(ReadWrite, 0xfed40000, 0x00005000) // Misc ICH
 		Memory32Fixed(ReadWrite, 0xfed45000, 0x0004b000) // Misc ICH