arm: improve tests for vmlasq*

gcc/testsuite/ChangeLog:

	* gcc.target/arm/mve/intrinsics/vmlasq_m_n_s16.c: Improve test.
	* gcc.target/arm/mve/intrinsics/vmlasq_m_n_s32.c: Likewise.
	* gcc.target/arm/mve/intrinsics/vmlasq_m_n_s8.c: Likewise.
	* gcc.target/arm/mve/intrinsics/vmlasq_m_n_u16.c: Likewise.
	* gcc.target/arm/mve/intrinsics/vmlasq_m_n_u32.c: Likewise.
	* gcc.target/arm/mve/intrinsics/vmlasq_m_n_u8.c: Likewise.
	* gcc.target/arm/mve/intrinsics/vmlasq_n_s16.c: Likewise.
	* gcc.target/arm/mve/intrinsics/vmlasq_n_s32.c: Likewise.
	* gcc.target/arm/mve/intrinsics/vmlasq_n_s8.c: Likewise.
	* gcc.target/arm/mve/intrinsics/vmlasq_n_u16.c: Likewise.
	* gcc.target/arm/mve/intrinsics/vmlasq_n_u32.c: Likewise.
	* gcc.target/arm/mve/intrinsics/vmlasq_n_u8.c: Likewise.
12 files changed