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/qemu-x86.h b/include/configs/qemu-x86.h
index b0d2ffe..476d37d 100644
--- a/include/configs/qemu-x86.h
+++ b/include/configs/qemu-x86.h
@@ -43,7 +43,7 @@
 #define CONFIG_ATAPI
 
 #undef CONFIG_SCSI_AHCI
-#undef CONFIG_CMD_SCSI
+#undef CONFIG_SCSI
 #else
 #define CONFIG_SCSI_DEV_LIST		\
 	{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH9_AHCI}