drm/i915/skl: add F0 stepping ID

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 840f08f..731b5ce 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -2378,6 +2378,7 @@
 #define SKL_REVID_C0		(0x2)
 #define SKL_REVID_D0		(0x3)
 #define SKL_REVID_E0		(0x4)
+#define SKL_REVID_F0		(0x5)
 
 #define BXT_REVID_A0		(0x0)
 #define BXT_REVID_B0		(0x3)