Prevent softlockup triggering in nvidiafb

[Dave Jones]

If the chip locks up, we get into a long polling loop,
where the softlockup detector kicks in.
See https://bugzilla.redhat.com/bugzilla/attachment.cgi?id=151878
for an example.

Signed-off-by: Dave Jones <davej@xxxxxxxxxx>

--- linux-2.6.20.noarch/drivers/video/nvidia/nv_accel.c~	2007-04-23 11:06:12.000000000 -0400
+++ linux-2.6.20.noarch/drivers/video/nvidia/nv_accel.c	2007-04-23 11:07:18.000000000 -0400
@@ -132,6 +132,8 @@ static void NVDmaWait(struct nvidia_par 
 			}
 		} else
 			par->dmaFree = dmaGet - par->dmaCurrent - 1;
+
+		touch_softlockup_watchdog();
 	}
 
 	if (!count) {
-
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