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/cmd/Makefile b/cmd/Makefile
index f95759e..6612a3b 100644
--- a/cmd/Makefile
+++ b/cmd/Makefile
@@ -112,7 +112,7 @@
 obj-$(CONFIG_SANDBOX) += host.o
 obj-$(CONFIG_CMD_SATA) += sata.o
 obj-$(CONFIG_CMD_SF) += sf.o
-obj-$(CONFIG_CMD_SCSI) += scsi.o
+obj-$(CONFIG_SCSI) += scsi.o
 obj-$(CONFIG_CMD_SHA1SUM) += sha1sum.o
 obj-$(CONFIG_CMD_SETEXPR) += setexpr.o
 obj-$(CONFIG_CMD_SOFTSWITCH) += softswitch.o
@@ -157,7 +157,7 @@
 
 ifdef CONFIG_SPL_BUILD
 ifdef CONFIG_SPL_SATA_SUPPORT
-obj-$(CONFIG_CMD_SCSI) += scsi.o
+obj-$(CONFIG_SCSI) += scsi.o
 endif
 endif # CONFIG_SPL_BUILD