arm: mvebu: Espressobin: Use function mmc_get_op_cond() for detecting eMMC

Use function mmc_get_op_cond() instead of mmc_init() for detecting presence
of eMMC. Documentation for this function says that it could be used to
detect the presence of SD/eMMC when no card detect logic is available.

This function is also used by mx6cuboxi board for detecting presence of eMMC.
Signed-off-by: NPali Rohár <pali@kernel.org>
Reviewed-by: NStefan Roese <sr@denx.de>

board/Marvell/mvebu_armada-37xx/board.c

@@ -124,7 +124,7 @@ int board_late_init(void)
 
 	/* eMMC is mmc dev num 1 */
 	mmc_dev = find_mmc_device(1);
-	emmc = (mmc_dev && mmc_init(mmc_dev) == 0);
+	emmc = (mmc_dev && mmc_get_op_cond(mmc_dev) == 0);
 
 	/* if eMMC is not present then remove it from DM */
 	if (!emmc && mmc_dev) {