soc/intel/baytrail,braswell: Drop aliases on MMCONF_BASE_ADDRESS

Add MMCONF_BUS_NUMBER=256 to match previous allocation.

Change-Id: I01a86481e392a9347afdc2860b58617b20c4f05a
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/50663
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
diff --git a/src/soc/intel/braswell/Kconfig b/src/soc/intel/braswell/Kconfig
index fcf07fa..0e1b6db 100644
--- a/src/soc/intel/braswell/Kconfig
+++ b/src/soc/intel/braswell/Kconfig
@@ -59,6 +59,10 @@
 config MMCONF_BASE_ADDRESS
 	default 0xe0000000
 
+config MMCONF_BUS_NUMBER
+	int
+	default 256
+
 config MAX_CPUS
 	int
 	default 4