[AArch64, 3/4] Reimplement multiply by element to get rid of inline assembly

[AArch64, 3/4] Reimplement multiply by element to get rid of inline assembly

gcc/
	* config/aarch64/aarch64-simd.md (vmul_n_f32): Remove inline assembly.
	Use builtin.
	(vmul_n_s16): Likewise.
	(vmul_n_s32): Likewise.
	(vmul_n_u16): Likewise.
	(vmul_n_u32): Likewise.
	(vmulq_n_f32): Likewise.
	(vmulq_n_f64): Likewise.
	(vmulq_n_s16): Likewise.
	(vmulq_n_s32): Likewise.
	(vmulq_n_u16): Likewise.
	(vmulq_n_u32): Likewise.

gcc/testsuite/
	* gcc.target/aarch64/simd/vmul_elem_1.c: Use intrinsics.

From-SVN: r236333