intel: Silence several "warning: unused parameter"

Trivially silence the compiler by adding '(void) foo;' for each unused
parameter.  These parameters could not be removed.  They are part of
interface used elsewhere in Mesa, and some of the other customers
actually use these parameters.

src/mesa/drivers/dri/intel/intel_tex.c

@@ -24,6 +24,8 @@ intelNewTextureObject(struct gl_context * ctx, GLuint name, GLenum target)
 {
    struct intel_texture_object *obj = CALLOC_STRUCT(intel_texture_object);
 
+   (void) ctx;
+
    DBG("%s\n", __FUNCTION__);
    _mesa_initialize_texture_object(&obj->base, name, target);