i965: use BRW_MAX_GRF, BRW_MAX_MRF

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

@@ -171,9 +171,9 @@ static INLINE struct brw_reg brw_reg( GLuint file,
 {
    struct brw_reg reg;
    if (type == BRW_GENERAL_REGISTER_FILE)
-      assert(nr < 128);
+      assert(nr < BRW_MAX_GRF);
    else if (type == BRW_MESSAGE_REGISTER_FILE)
-      assert(nr < 9);
+      assert(nr < BRW_MAX_MRF);
    else if (type == BRW_ARCHITECTURE_REGISTER_FILE)
       assert(nr <= BRW_ARF_IP);
 
@@ -538,6 +538,7 @@ static INLINE struct brw_reg brw_mask_reg( GLuint subnr )
 
 static INLINE struct brw_reg brw_message_reg( GLuint nr )
 {
+   assert(nr < BRW_MAX_MRF);
    return brw_vec8_reg(BRW_MESSAGE_REGISTER_FILE,
 		       nr,
 		       0);