Add QemuMacDrivers qemu_vga.ndrv revision d4e7d7a built as submodule

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
diff --git a/Makefile b/Makefile
index 31d41a7..c830d7a 100644
--- a/Makefile
+++ b/Makefile
@@ -552,7 +552,8 @@
 s390-ccw.img \
 spapr-rtas.bin slof.bin skiboot.lid \
 palcode-clipper \
-u-boot.e500
+u-boot.e500 \
+qemu_vga.ndrv
 else
 BLOBS=
 endif