ata: Migrate CONFIG_DWC_AHSATA to Kconfig

Signed-off-by: Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi>
diff --git a/configs/dms-ba16-1g_defconfig b/configs/dms-ba16-1g_defconfig
index cbc9e82..144a86b 100644
--- a/configs/dms-ba16-1g_defconfig
+++ b/configs/dms-ba16-1g_defconfig
@@ -28,6 +28,7 @@
 CONFIG_CMD_FAT=y
 CONFIG_CMD_FS_GENERIC=y
 CONFIG_ENV_IS_IN_SPI_FLASH=y
+CONFIG_DWC_AHSATA=y
 CONFIG_SPI_FLASH=y
 CONFIG_SPI_FLASH_STMICRO=y
 CONFIG_PHYLIB=y