drm/i915: Add new ICL PCI ID

A new PCI ID for ICL was added to BSpec, lets keep it in tight sync
as ICL is not protected by the alpha support flag anymore.

v2: Keeping BSpec order(Rodrigo)

BSepc: 21141
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190308215646.30436-1-jose.souza@intel.com

include/drm/i915_pciids.h

@@ -469,6 +469,7 @@
 	INTEL_VGA_DEVICE(0x8A57, info), \
 	INTEL_VGA_DEVICE(0x8A56, info), \
 	INTEL_VGA_DEVICE(0x8A71, info), \
-	INTEL_VGA_DEVICE(0x8A70, info)
+	INTEL_VGA_DEVICE(0x8A70, info), \
+	INTEL_VGA_DEVICE(0x8A53, info)
 
 #endif /* _I915_PCIIDS_H */