drm/nouveau/clk: fix crystal frequency retrieval on nv25

Signed-off-by: NViktor Novotný <noviktor@seznam.cz>
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/core/subdev/device/base.c

@@ -208,7 +208,7 @@ nouveau_devobj_ctor(struct nouveau_object *parent,
 
 		/* determine frequency of timing crystal */
 		if ( device->chipset < 0x17 ||
-		    (device->chipset >= 0x20 && device->chipset <= 0x25))
+		    (device->chipset >= 0x20 && device->chipset < 0x25))
 			strap &= 0x00000040;
 		else
 			strap &= 0x00400040;