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/hrcon_defconfig b/configs/hrcon_defconfig
index 52552e3..68b48b3 100644
--- a/configs/hrcon_defconfig
+++ b/configs/hrcon_defconfig
@@ -27,6 +27,7 @@
 CONFIG_CMD_PING=y
 CONFIG_CMD_EXT2=y
 CONFIG_DOS_PARTITION=y
+CONFIG_FSL_ESDHC=y
 CONFIG_MTD_NOR_FLASH=y
 CONFIG_NETDEVICES=y
 CONFIG_TSEC_ENET=y