Function vaddhn_high_u32

pub unsafe fn vaddhn_high_u32(
    r: uint16x4_t,
    a: uint32x4_t,
    b: uint32x4_t,
) -> uint16x8_t

Available on (AArch64 or target_arch="arm64ec") and target feature neon only.

Add returning High Narrow (high half).