drm/i915/cfl: Add a new CFL PCI ID.

One more CFL ID added to spec.

Cc: José Roberto de Souza <jose.souza@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180803232721.20038-1-rodrigo.vivi@intel.com

include/drm/i915_pciids.h

@@ -386,6 +386,7 @@
 	INTEL_VGA_DEVICE(0x3E91, info), /* SRV GT2 */ \
 	INTEL_VGA_DEVICE(0x3E92, info), /* SRV GT2 */ \
 	INTEL_VGA_DEVICE(0x3E96, info), /* SRV GT2 */ \
+	INTEL_VGA_DEVICE(0x3E98, info), /* SRV GT2 */ \
 	INTEL_VGA_DEVICE(0x3E9A, info)  /* SRV GT2 */
 
 /* CFL H */