ata: Migrate CONFIG_DWC_AHSATA to Kconfig

Signed-off-by: Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi>
diff --git a/configs/m53evk_defconfig b/configs/m53evk_defconfig
index 291144d..845aee4 100644
--- a/configs/m53evk_defconfig
+++ b/configs/m53evk_defconfig
@@ -39,6 +39,7 @@
 CONFIG_MTDPARTS_DEFAULT="mtdparts=mxc_nand:1024k(u-boot),512k(env1),512k(env2),14m(boot),240m(data),-@2048k(UBI)"
 CONFIG_CMD_UBI=y
 CONFIG_ENV_IS_IN_NAND=y
+CONFIG_DWC_AHSATA=y
 CONFIG_NAND=y
 CONFIG_NAND_MXC=y
 CONFIG_PHYLIB=y