drm/nouveau: Fix missing whitespace checkpatch.pl errors.

This patch fixes messages such as
ERROR: space required after that ','
ERROR: spaces required around that '='

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Signed-off-by: Francisco Jerez <currojerez@riseup.net>
diff --git a/drivers/gpu/drm/nouveau/nv50_graph.c b/drivers/gpu/drm/nouveau/nv50_graph.c
index 7289cba..7950bac 100644
--- a/drivers/gpu/drm/nouveau/nv50_graph.c
+++ b/drivers/gpu/drm/nouveau/nv50_graph.c
@@ -662,7 +662,7 @@
 			nv_rd32(dev, addr + 0x20);
 			pc = nv_rd32(dev, addr + 0x24);
 			oplow = nv_rd32(dev, addr + 0x70);
-			ophigh= nv_rd32(dev, addr + 0x74);
+			ophigh = nv_rd32(dev, addr + 0x74);
 			NV_INFO(dev, "PGRAPH_TRAP_MP_EXEC - "
 					"TP %d MP %d: ", tpid, i);
 			nouveau_enum_print(nv50_mp_exec_error_names, status);