drm/i915: Add is_dgfx to device info

This will be helpful to diferentiate a set of GPUs
with the same GEN version.

Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191024195122.22877-1-lucas.demarchi@intel.com

drivers/gpu/drm/i915/i915_drv.h

@@ -1551,6 +1551,7 @@ IS_SUBPLATFORM(const struct drm_i915_private *i915,
 }
 
 #define IS_MOBILE(dev_priv)	(INTEL_INFO(dev_priv)->is_mobile)
+#define IS_DGFX(dev_priv)   (INTEL_INFO(dev_priv)->is_dgfx)
 
 #define IS_I830(dev_priv)	IS_PLATFORM(dev_priv, INTEL_I830)
 #define IS_I845G(dev_priv)	IS_PLATFORM(dev_priv, INTEL_I845G)

drivers/gpu/drm/i915/intel_device_info.h

@@ -107,6 +107,7 @@ enum intel_ppgtt_type {
 	func(is_mobile); \
 	func(is_lp); \
 	func(require_force_probe); \
+	func(is_dgfx); \
 	/* Keep has_* in alphabetical order */ \
 	func(has_64bit_reloc); \
 	func(gpu_reset_clobbers_display); \