i965/vec4: Rename try_copy/constant_propagat{ion,e} to match the fs.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

src/mesa/drivers/dri/i965/brw_vec4.h

 			       vec4_instruction *pre_rhs_inst,
 			       vec4_instruction *last_rhs_inst);
 
-   bool try_copy_propagation(vec4_instruction *inst, int arg,
-                             src_reg *values[4]);
+   bool try_copy_propagate(vec4_instruction *inst, int arg,
+                           src_reg *values[4]);
 
    /** Walks an exec_list of ir_instruction and sends it through this visitor. */
    void visit_instructions(const exec_list *list);

src/mesa/drivers/dri/i965/brw_vec4_copy_propagation.cpp

 }
 
 static bool
-try_constant_propagation(struct brw_context *brw, vec4_instruction *inst,
-                         int arg, src_reg *values[4])
+try_constant_propagate(struct brw_context *brw, vec4_instruction *inst,
+                       int arg, src_reg *values[4])
 {
    /* For constant propagation, we only handle the same constant
     * across all 4 channels.  Some day, we should handle the 8-bit
 }
 
 bool
-vec4_visitor::try_copy_propagation(vec4_instruction *inst, int arg,
-                                   src_reg *values[4])
+vec4_visitor::try_copy_propagate(vec4_instruction *inst, int arg,
+                                 src_reg *values[4])
 {
    /* For constant propagation, we only handle the same constant
     * across all 4 channels.  Some day, we should handle the 8-bit
 	 if (c != 4)
 	    continue;
 
-	 if (try_constant_propagation(brw, inst, i, values) ||
-	     try_copy_propagation(inst, i, values))
+	 if (try_constant_propagate(brw, inst, i, values) ||
+	     try_copy_propagate(inst, i, values))
 	    progress = true;
       }