drm/i915: Add new AML_ULX support list

According to patch "drm/i915/aml: Introducing Amber Lake platform"
(e3646724). Add a new marco for AML ULX GT2 devices.

Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Jose Roberto de Souza <jose.souza@intel.com>
Signed-off-by: NLee, Shawn C <shawn.c.lee@intel.com>
Signed-off-by: NRodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1538034499-31256-1-git-send-email-shawn.c.lee@intel.com

drivers/gpu/drm/i915/i915_drv.h

@@ -2468,6 +2468,8 @@ intel_info(const struct drm_i915_private *dev_priv)
 #define IS_KBL_ULX(dev_priv)	(INTEL_DEVID(dev_priv) == 0x590E || \
 				 INTEL_DEVID(dev_priv) == 0x5915 || \
 				 INTEL_DEVID(dev_priv) == 0x591E)
+#define IS_AML_ULX(dev_priv)	(INTEL_DEVID(dev_priv) == 0x591C || \
+				 INTEL_DEVID(dev_priv) == 0x87C0)
 #define IS_SKL_GT2(dev_priv)	(IS_SKYLAKE(dev_priv) && \
 				 (dev_priv)->info.gt == 2)
 #define IS_SKL_GT3(dev_priv)	(IS_SKYLAKE(dev_priv) && \