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/cgtqmx6eval_defconfig b/configs/cgtqmx6eval_defconfig
index 6b45a10..2b49782 100644
--- a/configs/cgtqmx6eval_defconfig
+++ b/configs/cgtqmx6eval_defconfig
@@ -49,6 +49,7 @@
 CONFIG_DWC_AHSATA=y
 CONFIG_DFU_MMC=y
 CONFIG_DFU_SF=y
+CONFIG_FSL_ESDHC=y
 CONFIG_PHYLIB=y
 CONFIG_MXC_SPI=y
 CONFIG_USB=y