ata: Migrate CONFIG_DWC_AHSATA to Kconfig

Signed-off-by: Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi>
diff --git a/configs/apalis_imx6_nospl_it_defconfig b/configs/apalis_imx6_nospl_it_defconfig
index 6eba47b..5d1243a 100644
--- a/configs/apalis_imx6_nospl_it_defconfig
+++ b/configs/apalis_imx6_nospl_it_defconfig
@@ -34,6 +34,7 @@
 CONFIG_CMD_FAT=y
 CONFIG_CMD_FS_GENERIC=y
 CONFIG_ENV_IS_IN_MMC=y
+CONFIG_DWC_AHSATA=y
 CONFIG_PHYLIB=y
 CONFIG_PHY_MICREL=y
 CONFIG_PHY_MICREL_KSZ90X1=y