cm-t54: fix eMMC boot mode check

Boot from eMMC boot partition corresponds to BOOT_DEVICE_MMC2
omap_bootmode, while BOOT_DEVICE_MMC2_2 corresponds to the user
data partition boot.

Fix mmc_get_env_part() boot mode check to use a correct value.

Signed-off-by: Dmitry Lifshitz <lifshitz@compulab.co.il>
diff --git a/board/compulab/cm_t54/cm_t54.c b/board/compulab/cm_t54/cm_t54.c
index 306491b..944b723 100644
--- a/board/compulab/cm_t54/cm_t54.c
+++ b/board/compulab/cm_t54/cm_t54.c
@@ -89,7 +89,7 @@
 	 * If booted from eMMC boot partition then force eMMC
 	 * FIRST boot partition to be env storage
 	 */
-	if (bootmode == BOOT_DEVICE_MMC2_2)
+	if (bootmode == BOOT_DEVICE_MMC2)
 		bootpart = 1;
 
 	return bootpart;