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/P1021RDB-PC_defconfig b/configs/P1021RDB-PC_defconfig
index 940f6c4..9008e31 100644
--- a/configs/P1021RDB-PC_defconfig
+++ b/configs/P1021RDB-PC_defconfig
@@ -28,6 +28,7 @@
 CONFIG_MTDIDS_DEFAULT="nor0=ef000000.nor"
 CONFIG_MTDPARTS_DEFAULT="mtdparts=ef000000.nor:256k(vsc7385-firmware),256k(dtb),4608k(kernel),9728k(fs),256k(qe-ucode-firmware),1280k(u-boot)"
 CONFIG_ENV_IS_IN_FLASH=y
+CONFIG_FSL_ESDHC=y
 CONFIG_MTD_NOR_FLASH=y
 CONFIG_SPI_FLASH=y
 CONFIG_SPI_FLASH_SPANSION=y