i965: Declare intel_miptree_alloc_mcs() as static

It's not used outside of intel_mipmap_tree.c, nor should it ever be.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Topi Pohjolainen <topi.pohjolainen@intel.com>

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

@@ -49,6 +49,11 @@
 
 #define FILE_DEBUG_FLAG DEBUG_MIPTREE
 
+static bool
+intel_miptree_alloc_mcs(struct brw_context *brw,
+                        struct intel_mipmap_tree *mt,
+                        GLuint num_samples);
+
 /**
  * Determine which MSAA layout should be used by the MSAA surface being
  * created, based on the chip generation and the surface type.
@@ -1300,7 +1305,7 @@ intel_miptree_copy_teximage(struct brw_context *brw,
    intel_obj->needs_validate = true;
 }
 
-bool
+static bool
 intel_miptree_alloc_mcs(struct brw_context *brw,
                         struct intel_mipmap_tree *mt,
                         GLuint num_samples)

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

@@ -637,11 +637,6 @@ intel_miptree_copy_teximage(struct brw_context *brw,
                             struct intel_texture_image *intelImage,
                             struct intel_mipmap_tree *dst_mt, bool invalidate);
 
-bool
-intel_miptree_alloc_mcs(struct brw_context *brw,
-                        struct intel_mipmap_tree *mt,
-                        GLuint num_samples);
-
 /**
  * \name Miptree HiZ functions
  * \{