drm/i915: Remove unused intel_ringbuffer->ring_flag

This can always be re-added should somebody find a use...
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

drivers/gpu/drm/i915/i915_gem.c

@@ -1580,9 +1580,8 @@ i915_gem_process_flushing_list(struct drm_device *dev,
 				 gpu_write_list) {
 		struct drm_gem_object *obj = &obj_priv->base;
 
-		if ((obj->write_domain & flush_domains) ==
-		    obj->write_domain &&
-		    obj_priv->ring->ring_flag == ring->ring_flag) {
+		if (obj->write_domain & flush_domains &&
+		    obj_priv->ring == ring) {
 			uint32_t old_write_domain = obj->write_domain;
 
 			obj->write_domain = 0;

drivers/gpu/drm/i915/intel_ringbuffer.c

@@ -805,7 +805,6 @@ struct intel_ring_buffer render_ring = {
 		.tail = PRB0_TAIL,
 		.start = PRB0_START
 	},
-	.ring_flag		= I915_EXEC_RENDER,
 	.size			= 32 * PAGE_SIZE,
 	.alignment		= PAGE_SIZE,
 	.virtual_start		= NULL,
@@ -843,7 +842,6 @@ struct intel_ring_buffer bsd_ring = {
 		.tail = BSD_RING_TAIL,
 		.start = BSD_RING_START
 	},
-	.ring_flag		= I915_EXEC_BSD,
 	.size			= 32 * PAGE_SIZE,
 	.alignment		= PAGE_SIZE,
 	.virtual_start		= NULL,

drivers/gpu/drm/i915/intel_ringbuffer.h

@@ -16,7 +16,6 @@ struct  intel_ring_buffer {
 			u32 tail;
 			u32 start;
 	} regs;
-	unsigned int	ring_flag;
 	unsigned long	size;
 	unsigned int	alignment;
 	void		*virtual_start;