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/warp_defconfig b/configs/warp_defconfig
index bddf4bc..db268f0 100644
--- a/configs/warp_defconfig
+++ b/configs/warp_defconfig
@@ -27,6 +27,7 @@
 CONFIG_ENV_IS_IN_MMC=y
 # CONFIG_NET is not set
 CONFIG_DFU_MMC=y
+CONFIG_FSL_ESDHC=y
 CONFIG_USB=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_GADGET=y