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/pfla02_defconfig b/configs/pfla02_defconfig
index f3327f3..27c3d58 100644
--- a/configs/pfla02_defconfig
+++ b/configs/pfla02_defconfig
@@ -37,6 +37,7 @@
 CONFIG_CMD_UBI=y
 # CONFIG_SPL_PARTITION_UUIDS is not set
 CONFIG_DM=y
+CONFIG_FSL_ESDHC=y
 CONFIG_MTD=y
 CONFIG_NAND=y
 CONFIG_NAND_MXS=y