gcc, Arm: Fix testisms for MVE testsuite

gcc, Arm: Fix testisms for MVE testsuite

This patch fixes some testism where -mfpu=auto was missing or where we could
end up with -mfloat-abi=hard and soft on the same command-line.

gcc/testsuite/ChangeLog:
2020-03-20  Andre Vieira  <andre.simoesdiasvieira@arm.com>

	* gcc.target/arm/mve/intrinsics/mve_fp_fpu1.c: Fix testisms.
	* gcc.target/arm/mve/intrinsics/mve_fp_fpu2.c: Likewise.
	* gcc.target/arm/mve/intrinsics/mve_fpu1.c: Likewise.
	* gcc.target/arm/mve/intrinsics/mve_fpu2.c: Likewise.
	* gcc.target/arm/mve/intrinsics/mve_fpu3.c: Likewise.
	* gcc.target/arm/mve/intrinsics/mve_libcall1.c: Likewise.
	* gcc.target/arm/mve/intrinsics/mve_libcall2.c: Likewise.
	* gcc.target/arm/mve/intrinsics/mve_vector_float.c: Likewise.
	* gcc.target/arm/mve/intrinsics/mve_vector_float1.c: Likewise.
	* gcc.target/arm/mve/intrinsics/mve_vector_float2.c: Likewise.
	* gcc.target/arm/mve/intrinsics/mve_vector_int.c: Likewise.
	* gcc.target/arm/mve/intrinsics/mve_vector_int1.c: Likewise.
	* gcc.target/arm/mve/intrinsics/mve_vector_int2.c: Likewise.
	* gcc.target/arm/mve/intrinsics/mve_vector_uint.c: Likewise.
	* gcc.target/arm/mve/intrinsics/mve_vector_uint1.c: Likewise.
	* gcc.target/arm/mve/intrinsics/mve_vector_uint2.c: Likewise.
	* gcc.target/arm/mve/intrinsics/vshrntq_m_n_u32.c: Likewise.