core-arch: Add Arm f16 vector types

Author: mrkajetanp

Diff for: crates/core_arch/src/aarch64/mod.rs

@@ -1,7 +1,7 @@
 //! AArch64 intrinsics.
 //!
-//! The reference for NEON is [ARM's NEON Intrinsics Reference][arm_ref]. The
-//! [ARM's NEON Intrinsics Online Database][arm_dat] is also useful.
+//! The reference for NEON is [Arm's NEON Intrinsics Reference][arm_ref]. The
+//! [Arm's NEON Intrinsics Online Database][arm_dat] is also useful.
 //!
 //! [arm_ref]: http://infocenter.arm.com/help/topic/com.arm.doc.ihi0073a/IHI0073A_arm_neon_intrinsics_ref.pdf
 //! [arm_dat]: https://developer.arm.com/technologies/neon/intrinsics