Convert CONFIG_CMD_SATA to Kconfig

This converts the following to Kconfig:
   CONFIG_CMD_SATA

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/arch/Kconfig b/arch/Kconfig
index 8d5d77a..7e76abd 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -76,6 +76,7 @@
 	imply HASH_VERIFY
 	imply LZMA
 	imply SCSI
+	imply CMD_SATA
 
 config SH
 	bool "SuperH architecture"