ata: Migrate CONFIG_FSL_SATA to Kconfig

Use 'imply' here liberally to avoid the combinatorial explosion of
defconfig changes in the PowerPC boards.

Signed-off-by: Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi>
diff --git a/configs/controlcenterd_36BIT_SDCARD_defconfig b/configs/controlcenterd_36BIT_SDCARD_defconfig
index 58729b6..19a4daa 100644
--- a/configs/controlcenterd_36BIT_SDCARD_defconfig
+++ b/configs/controlcenterd_36BIT_SDCARD_defconfig
@@ -32,6 +32,7 @@
 CONFIG_CMD_FAT=y
 CONFIG_ENV_IS_IN_MMC=y
 CONFIG_DM=y
+CONFIG_FSL_SATA=y
 CONFIG_SPI_FLASH=y
 CONFIG_SPI_FLASH_STMICRO=y
 CONFIG_PHYLIB=y