tcg/ppc: Sink tcg_to_bc usage into tcg_out_bc

Rename the current tcg_out_bc function to tcg_out_bc_lab, and
create a new function that takes an integer displacement + link.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
1 file changed