PR target/97150 AArch64: 2nd parameter of unsigned Neon scalar shift intrinsics shoul...

PR target/97150 AArch64: 2nd parameter of unsigned Neon scalar shift intrinsics should be signed

In this PR the second argument to the intrinsics should be signed but we
use an unsigned one erroneously.
The corresponding builtins are already using the correct types so it's
just a matter of correcting the signatures in arm_neon.h

gcc/
	PR target/97150
	* config/aarch64/arm_neon.h (vqrshlb_u8): Make second argument
	signed.
	(vqrshlh_u16): Likewise.
	(vqrshls_u32): Likewise.
	(vqrshld_u64): Likewise.
	(vqshlb_u8): Likewise.
	(vqshlh_u16): Likewise.
	(vqshls_u32): Likewise.
	(vqshld_u64): Likewise.
	(vshld_u64): Likewise.

gcc/testsuite/
	PR target/97150
	* gcc.target/aarch64/pr97150.c: New test.