drm/nv50/pm: s/PLL_UNK05/PLL_VDEC/

Following to "drm/nv50/pm: s/unk05/vdec/", let's rename the PLL to PLL_VDEC

PLL names are purely indicative and are based on the most important engine
it clocks.

Signed-off-by: Martin Peres <martin.peres@labri.fr>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/nouveau_pm.c b/drivers/gpu/drm/nouveau/nouveau_pm.c
index ea620d8..9177358 100644
--- a/drivers/gpu/drm/nouveau/nouveau_pm.c
+++ b/drivers/gpu/drm/nouveau/nouveau_pm.c
@@ -154,7 +154,7 @@
 		nouveau_pm_clock_set(dev, perflvl, PLL_CORE, perflvl->core);
 		nouveau_pm_clock_set(dev, perflvl, PLL_SHADER, perflvl->shader);
 		nouveau_pm_clock_set(dev, perflvl, PLL_MEMORY, perflvl->memory);
-		nouveau_pm_clock_set(dev, perflvl, PLL_UNK05, perflvl->vdec);
+		nouveau_pm_clock_set(dev, perflvl, PLL_VDEC, perflvl->vdec);
 	}
 
 	pm->cur = perflvl;
@@ -220,7 +220,7 @@
 		if (ret > 0)
 			perflvl->shader = ret;
 
-		ret = pm->clock_get(dev, PLL_UNK05);
+		ret = pm->clock_get(dev, PLL_VDEC);
 		if (ret > 0)
 			perflvl->vdec = ret;
 	}