sunxvr1000: Add missing FB=y depenency.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index a5755b8..f15fb02 100644
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -911,7 +911,7 @@
 
 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