Cleanup USB and partition defines
diff --git a/disk/part_dos.c b/disk/part_dos.c
index 49d4fc1..a37c32d 100644
--- a/disk/part_dos.c
+++ b/disk/part_dos.c
@@ -38,7 +38,8 @@
#if ((CONFIG_COMMANDS & CFG_CMD_IDE) || \
(CONFIG_COMMANDS & CFG_CMD_SCSI) || \
(CONFIG_COMMANDS & CFG_CMD_USB) || \
- (CONFIG_SYSTEMACE)) && defined(CONFIG_DOS_PARTITION)
+ defined(CONFIG_MMC) || \
+ defined(CONFIG_SYSTEMACE) ) && defined(CONFIG_DOS_PARTITION)
/* Convert char[4] in little endian format to the host format integer
*/