sunxvr1000: Add missing FB=y depenency.

Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/video/Kconfig

@@ -911,7 +911,7 @@ config FB_XVR2500
 
 config FB_XVR1000
 	bool "Sun XVR-1000 support"
-	depends on SPARC64
+	depends on (FB = y) && SPARC64
 	select FB_CFB_FILLRECT
 	select FB_CFB_COPYAREA
 	select FB_CFB_IMAGEBLIT