freedreno/computerator: Fix @buf header

Order is important in the grammar, the more specific match needs to go
first.

Fixes: ba1c989348 ("freedreno/computerator: pass iova of buffer to const register")
Signed-off-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14231>

src/freedreno/ir3/ir3_parser.y

@@ -704,7 +704,7 @@ const_header:      T_A_CONST '(' T_CONSTANT ')' const_val ',' const_val ',' cons
 }
 
 buf_header_addr_reg:
-|                  '(' T_CONSTANT ')' {
+                   '(' T_CONSTANT ')' {
                        assert(($2 & 0x1) == 0);  /* half-reg not allowed */
                        unsigned reg = $2 >> 1;
 
@@ -712,6 +712,7 @@ buf_header_addr_reg:
                        /* reserve space in immediates for the actual value to be plugged in later: */
                        add_const($2, 0, 0, 0, 0);
 }
+|
 
 buf_header:        T_A_BUF const_val {
                        int idx = info->num_bufs++;