target/mips: Use gen_op_addr_addi() when possible

target/mips: Use gen_op_addr_addi() when possible

Replace tcg_gen_movi_tl() + gen_op_addr_add() by a single
gen_op_addr_addi() call.

gen_op_addr_addi() calls tcg_gen_addi_tl() which might
optimize if the immediate is zero.

Suggested-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20241010215015.44326-13-philmd@linaro.org>