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/ls1012a2g5rdb_qspi_defconfig b/configs/ls1012a2g5rdb_qspi_defconfig
index 47e8eb2..6685a6f 100644
--- a/configs/ls1012a2g5rdb_qspi_defconfig
+++ b/configs/ls1012a2g5rdb_qspi_defconfig
@@ -31,6 +31,7 @@
 CONFIG_DM=y
 # CONFIG_BLK is not set
 CONFIG_DM_MMC=y
+CONFIG_FSL_ESDHC=y
 CONFIG_DM_SPI_FLASH=y
 CONFIG_SPI_FLASH=y
 CONFIG_FSL_PFE=y