i965/drm: Move _drm_bacon_context to intel_bufmgr_gem.c.

This moves us one step closer to killing off intel_bufmgr_priv.h.

We might want to nuke it altogether, since it's basically just a
uint32_t handle, but for now, let's focus on removing files.

Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Jason Ekstrand <jason@jlekstrand.net>

src/mesa/drivers/dri/i965/intel_bufmgr_gem.c

@@ -107,6 +107,11 @@ atomic_add_unless(int *v, int add, int unless)
  */
 #define lower_32_bits(n) ((__u32)(n))
 
+struct _drm_bacon_context {
+	unsigned int ctx_id;
+	struct _drm_bacon_bufmgr *bufmgr;
+};
+
 typedef struct _drm_bacon_bo_gem drm_bacon_bo_gem;
 
 struct drm_bacon_gem_bo_bucket {

src/mesa/drivers/dri/i965/intel_bufmgr_priv.h

@@ -42,9 +42,4 @@
 struct _drm_bacon_bufmgr {
 };
 
-struct _drm_bacon_context {
-	unsigned int ctx_id;
-	struct _drm_bacon_bufmgr *bufmgr;
-};
-
 #endif /* INTEL_BUFMGR_PRIV_H */