RISC-V: Fix asm checks regression due to recent middle-end change

The recent middle-end change result in some asm check failures.
This patch would like to fix the asm check by adjust the times.

gcc/testsuite/ChangeLog:

	* gcc.target/riscv/rvv/autovec/vls/shift-1.c: Fix asm check
	count.
	* gcc.target/riscv/rvv/autovec/vls/shift-2.c: Ditto.
	* gcc.target/riscv/rvv/autovec/vls/shift-3.c: Ditto.

Signed-off-by: Pan Li <pan2.li@intel.com>