fixing dmi match for hp t5745 and hp st5747 thin client

Match the correct information which is DMI_PRODUCT_NAME instead of DMI_BOARD_NAME
See dmidecode information on launchpad for both thin client:

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/911920
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/911916

Signed-off-by: Marc Gariepy <mgariepy@ubuntu.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/intel_lvds.c

@@ -750,7 +750,7 @@ static const struct dmi_system_id intel_no_lvds[] = {
 		.ident = "Hewlett-Packard t5745",
 		.matches = {
 			DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
-			DMI_MATCH(DMI_BOARD_NAME, "hp t5745"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "hp t5745"),
 		},
 	},
 	{
@@ -758,7 +758,7 @@ static const struct dmi_system_id intel_no_lvds[] = {
 		.ident = "Hewlett-Packard st5747",
 		.matches = {
 			DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
-			DMI_MATCH(DMI_BOARD_NAME, "hp st5747"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "hp st5747"),
 		},
 	},
 	{