drm/i915: Introduce HAS_64BIT_RELOC

Move has_64bit_reloc into dev_priv->info. This will make it visible
in the feature listing debug output.

v2:
- Keep the struct member to keep GCC fragile but happy (Chris)
v3:
- More detailed commit message (Chris)
- Include forgotten CHV and BXT (Chris)

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/1478162386-5018-1-git-send-email-joonas.lahtinen@linux.intel.com

drivers/gpu/drm/i915/i915_pci.c

@@ -288,7 +288,8 @@ static const struct intel_device_info intel_haswell_info = {
 #define BDW_FEATURES \
 	HSW_FEATURES, \
 	BDW_COLORS, \
-	.has_logical_ring_contexts = 1
+	.has_logical_ring_contexts = 1, \
+	.has_64bit_reloc = 1
 
 static const struct intel_device_info intel_broadwell_info = {
 	BDW_FEATURES,
@@ -308,6 +309,7 @@ static const struct intel_device_info intel_cherryview_info = {
 	.has_hotplug = 1,
 	.ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING,
 	.is_cherryview = 1,
+	.has_64bit_reloc = 1,
 	.has_psr = 1,
 	.has_runtime_pm = 1,
 	.has_resource_streamer = 1,
@@ -347,6 +349,7 @@ static const struct intel_device_info intel_broxton_info = {
 	.has_hotplug = 1,
 	.ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING,
 	.num_pipes = 3,
+	.has_64bit_reloc = 1,
 	.has_ddi = 1,
 	.has_fpga_dbg = 1,
 	.has_fbc = 1,