staging: gma500: Depend on X86

 The gma500 driver calls set_pages_uc, which is an x86 pageattr call.
 Since this driver is only used with Intel x86 motherboard chipsets,
 make the driver depend on X86.
Signed-off-by: NJeff Mahoney <jeffm@suse.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/staging/gma500/Kconfig

 config DRM_PSB
 	tristate "Intel GMA500 KMS Framebuffer"
-	depends on DRM && PCI
+	depends on DRM && PCI && X86
 	select FB_CFB_COPYAREA
         select FB_CFB_FILLRECT
         select FB_CFB_IMAGEBLIT