arm64: mvebu: Enable SDHCI/MMC support for the db-88f7040/8040

This patch enables the MMC support for the SDHCI controller on the
Armada 7k db-88f7040 and the Armada 8k db-88f8040 board.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Nadav Haklai <nadavh@marvell.com>
Cc: Kostya Porotchkin <kostap@marvell.com>
Cc: Wilson Ding <dingwei@marvell.com>
Cc: Victor Gu <xigu@marvell.com>
Cc: Hua Jing <jinghua@marvell.com>
Cc: Terry Zhou <bjzhou@marvell.com>
Cc: Hanna Hawa <hannah@marvell.com>
Cc: Haim Boot <hayim@marvell.com>
diff --git a/include/configs/mvebu_armada-8k.h b/include/configs/mvebu_armada-8k.h
index 0055cb0..7275f79 100644
--- a/include/configs/mvebu_armada-8k.h
+++ b/include/configs/mvebu_armada-8k.h
@@ -116,6 +116,9 @@
 #define CONFIG_SYS_SCSI_MAX_DEVICE	(CONFIG_SYS_SCSI_MAX_SCSI_ID * \
 					 CONFIG_SYS_SCSI_MAX_LUN)
 
+/* MMC/SD IP block */
+#define CONFIG_GENERIC_MMC
+
 #define CONFIG_SUPPORT_VFAT
 
 /* DISK Partition support */