nxp:add driver support for sd and emmc

SD & eMMC driver support for NXP SoC.

Signed-off-by: Ruchika Gupta <ruchika.gupta@nxp.com>
Signed-off-by: Pankaj Gupta <pankaj.gupta@nxp.com>
Change-Id: I245fecd2c791697238b5667c46bf5466379695ce
diff --git a/drivers/nxp/sd/sd_mmc.mk b/drivers/nxp/sd/sd_mmc.mk
new file mode 100644
index 0000000..af91b1f
--- /dev/null
+++ b/drivers/nxp/sd/sd_mmc.mk
@@ -0,0 +1,28 @@
+#
+# Copyright 2020 NXP
+#
+# SPDX-License-Identifier: BSD-3-Clause
+#
+
+ifeq (${ADD_SD_MMC},)
+
+ADD_SD_MMC	:= 1
+
+SD_DRIVERS_PATH		:=  ${PLAT_DRIVERS_PATH}/sd
+
+SD_MMC_BOOT_SOURCES	+= ${SD_DRIVERS_PATH}/sd_mmc.c \
+			   drivers/io/io_block.c
+
+PLAT_INCLUDES		+= -I$(SD_DRIVERS_PATH)
+
+ifeq (${BL_COMM_SD_MMC_NEEDED},yes)
+BL_COMMON_SOURCES	+= ${SD_MMC_BOOT_SOURCES}
+else
+ifeq (${BL2_SD_MMC_NEEDED},yes)
+BL2_SOURCES		+= ${SD_MMC_BOOT_SOURCES}
+endif
+ifeq (${BL3_SD_MMC_NEEDED},yes)
+BL31_SOURCES		+= ${SD_MMC_BOOT_SOURCES}
+endif
+endif
+endif