video: Rename CONFIG_DM_VIDEO to CONFIG_VIDEO

Now that all the old code is gone, rename this option. Driver model
migration is now complete.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/lib/efi_loader/Makefile b/lib/efi_loader/Makefile
index e187d2a..f8e8afe 100644
--- a/lib/efi_loader/Makefile
+++ b/lib/efi_loader/Makefile
@@ -66,7 +66,7 @@
 endif
 obj-y += efi_watchdog.o
 obj-$(CONFIG_EFI_ESRT) += efi_esrt.o
-obj-$(CONFIG_DM_VIDEO) += efi_gop.o
+obj-$(CONFIG_VIDEO) += efi_gop.o
 obj-$(CONFIG_BLK) += efi_disk.o
 obj-$(CONFIG_NET) += efi_net.o
 obj-$(CONFIG_GENERATE_ACPI_TABLE) += efi_acpi.o