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/mx53ard_defconfig b/configs/mx53ard_defconfig
index e772def..3bcd723 100644
--- a/configs/mx53ard_defconfig
+++ b/configs/mx53ard_defconfig
@@ -14,6 +14,7 @@
 CONFIG_CMD_PING=y
 CONFIG_CMD_FAT=y
 CONFIG_ENV_IS_IN_MMC=y
+CONFIG_FSL_ESDHC=y
 CONFIG_NAND=y
 CONFIG_NAND_MXC=y
 CONFIG_NETDEVICES=y