gma500: Fix dependencies

ACPI Video is used by GMA500 so we need to depend upon it

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/staging/gma500/Kconfig b/drivers/staging/gma500/Kconfig
index bfe2166..6f19fb7 100644
--- a/drivers/staging/gma500/Kconfig
+++ b/drivers/staging/gma500/Kconfig
@@ -1,6 +1,6 @@
 config DRM_PSB
 	tristate "Intel GMA5/600 KMS Framebuffer"
-	depends on DRM && PCI && X86
+	depends on DRM && PCI && X86 && ACPI_VIDEO
 	select FB_CFB_COPYAREA
         select FB_CFB_FILLRECT
         select FB_CFB_IMAGEBLIT