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/platinum_titanium_defconfig b/configs/platinum_titanium_defconfig
index 06bdd97..a0df27b 100644
--- a/configs/platinum_titanium_defconfig
+++ b/configs/platinum_titanium_defconfig
@@ -42,6 +42,7 @@
 CONFIG_MTDPARTS_DEFAULT="mtdparts=gpmi-nand:14M(spl),2M(uboot),512k(env1),512k(env2),-(ubi)"
 CONFIG_CMD_UBI=y
 CONFIG_ENV_IS_IN_NAND=y
+CONFIG_FSL_ESDHC=y
 CONFIG_NAND=y
 CONFIG_NAND_MXS=y
 CONFIG_PHYLIB=y