treewide: Migrate CONFIG_FSL_ESDHC to Kconfig

Migrate the CONFIG_FSL_ESDHC option to Kconfig.

Signed-off-by: Mario Six <mario.six@gdsys.cc>
diff --git a/configs/mccmon6_sd_defconfig b/configs/mccmon6_sd_defconfig
index e883206..2ad871c 100644
--- a/configs/mccmon6_sd_defconfig
+++ b/configs/mccmon6_sd_defconfig
@@ -26,6 +26,7 @@
 CONFIG_MTDPARTS_DEFAULT="mtdparts=8000000.nor:32m@0x0(mccmon6-image.nor),256k@0x40000(u-boot-env.nor),1m@0x80000(u-boot.nor),8m@0x180000(kernel.nor),8m@0x980000(swupdate-kernel.nor),8m@0x1180000(swupdate-rootfs.nor),128k@0x1980000(kernel-dtb.nor),128k@0x19C0000(swupdate-kernel-dtb.nor)"
 CONFIG_ENV_IS_IN_FLASH=y
 CONFIG_DM=y
+CONFIG_FSL_ESDHC=y
 CONFIG_MTD=y
 CONFIG_MTD_NOR_FLASH=y
 CONFIG_SPI_FLASH=y