spl: Print from which mmc slot spl is trying to boot

On some sunxi boards (and presumably also non sunxi boards) u-boot can
be either loaded from a sdcard in a micro-sd slot, or from eMMC.

Print which MMC spl tries to boot from, to help debugging.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/common/spl/spl.c b/common/spl/spl.c
index e5167bf..82e7f58 100644
--- a/common/spl/spl.c
+++ b/common/spl/spl.c
@@ -210,9 +210,9 @@
 	{ BOOT_DEVICE_RAM, "RAM" },
 #endif
 #ifdef CONFIG_SPL_MMC_SUPPORT
-	{ BOOT_DEVICE_MMC1, "MMC" },
-	{ BOOT_DEVICE_MMC2, "MMC" },
-	{ BOOT_DEVICE_MMC2_2, "MMC" },
+	{ BOOT_DEVICE_MMC1, "MMC1" },
+	{ BOOT_DEVICE_MMC2, "MMC2" },
+	{ BOOT_DEVICE_MMC2_2, "MMC2_2" },
 #endif
 #ifdef CONFIG_SPL_NAND_SUPPORT
 	{ BOOT_DEVICE_NAND, "NAND" },