drm: add i945GM PCI ID

From: Charles F. Johnson <charles.f.johnson@intel.com>
Signed-off-by: Dave Airlie <airlied@linux.ie>

drivers/char/drm/drm_pciids.h

@@ -242,5 +242,6 @@
 	{0x8086, 0x2582, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, \
 	{0x8086, 0x2592, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, \
 	{0x8086, 0x2772, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, \
+	{0x8086, 0x27a2, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, \
 	{0, 0, 0}