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/P1020UTM-PC_defconfig b/configs/P1020UTM-PC_defconfig
index 1065255..613ad49 100644
--- a/configs/P1020UTM-PC_defconfig
+++ b/configs/P1020UTM-PC_defconfig
@@ -24,6 +24,7 @@
 CONFIG_CMD_EXT2=y
 CONFIG_CMD_FAT=y
 CONFIG_ENV_IS_IN_FLASH=y
+CONFIG_FSL_ESDHC=y
 CONFIG_MTD_NOR_FLASH=y
 CONFIG_NETDEVICES=y
 CONFIG_PHY_GIGE=y