dm: scsi: Rename CONFIG_CMD_SCSI to CONFIG_SCSI

This option currently enables both the command and the SCSI functionality.
Rename the existing option to CONFIG_SCSI since most of the code relates
to the feature.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/include/configs/x86-common.h b/include/configs/x86-common.h
index a2822e0..b79f47b 100644
--- a/include/configs/x86-common.h
+++ b/include/configs/x86-common.h
@@ -100,7 +100,7 @@
 #define CONFIG_CMD_IRQ
 #define CONFIG_CMD_PCI
 #define CONFIG_CMD_GETTIME
-#define CONFIG_CMD_SCSI
+#define CONFIG_SCSI
 
 #define CONFIG_CMD_ZBOOT