[RISCV] Add tests for (and (add x, c1), (lshr y, c2))

Add tests for (and (add x, c1), (lshr y, c2)).

Signed-off-by: WANG Rui <wangrui@loongson.cn>

Reviewed By: craig.topper

Differential Revision: https://reviews.llvm.org/D154808