mb/intel/dg43gt: Don't redefine MMCONF_BASE_ADDRESS

Change-Id: I4d62a04778c8f634b48eee459808f640451b9b48
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35871
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>

src/mainboard/intel/dg43gt/Kconfig

@@ -25,11 +25,6 @@ config VGA_BIOS_ID
 	string
 	default "8086,2e22"
 
-
-config MMCONF_BASE_ADDRESS
-	hex
-	default 0xe0000000
-
 config MAINBOARD_DIR
 	string
 	default "intel/dg43gt"