RISC-V: Simplify testcase condition for RVV tests [NFC]

RISC-V: Simplify testcase condition for RVV tests [NFC]

We got some trouble on some platform, it show get twice for the asm, but
it only show once, seems like our pattern might be too complicated, so
simplify that make every platform happey with those testcase.

gcc/testsuite/ChangeLog:

	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-10.c: Refine the scan
	condition.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-11.c: Ditto.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-12.c: Ditto.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-13.c: Ditto.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-14.c: Ditto.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-15.c: Ditto.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-16.c: Ditto.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-17.c: Ditto.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-18.c: Ditto.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-19.c: Ditto.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-20.c: Ditto.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-21.c: Ditto.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-22.c: Ditto.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-23.c: Ditto.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-24.c: Ditto.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-25.c: Ditto.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-26.c: Ditto.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-27.c: Ditto.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-28.c: Ditto.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-1.c: Ditto.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-2.c: Ditto.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-3.c: Ditto.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-4.c: Ditto.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-5.c: Ditto.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-6.c: Ditto.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-7.c: Ditto.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-8.c: Ditto.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-9.c: Ditto.