drm/i915: Make IS_GEN-range macro only take dev_priv

Saves 944 bytes of .rodata strings.

v2: Add parantheses around dev_priv. (Ville Syrjala)
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: David Weinehall <david.weinehall@linux.intel.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Jani Nikula <jani.nikula@linux.intel.com>
Acked-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>

drivers/gpu/drm/i915/i915_drv.h

@@ -2612,7 +2612,7 @@ struct drm_i915_cmd_table {
  *
  * Use GEN_FOREVER for unbound start and or end.
  */
-#define IS_GEN(p, s, e) ({ \
+#define IS_GEN(dev_priv, s, e) ({ \
 	unsigned int __s = (s), __e = (e); \
 	BUILD_BUG_ON(!__builtin_constant_p(s)); \
 	BUILD_BUG_ON(!__builtin_constant_p(e)); \
@@ -2622,7 +2622,7 @@ struct drm_i915_cmd_table {
 		__e = BITS_PER_LONG - 1; \
 	else \
 		__e = (e) - 1; \
-	!!(INTEL_INFO(p)->gen_mask & GENMASK((__e), (__s))); \
+	!!((dev_priv)->info.gen_mask & GENMASK((__e), (__s))); \
 })
 
 /*