crypto: arm64/ghash-ce - use frame_push/pop macros consistently

Use the frame_push and frame_pop macros to set up the stack frame so
that return address protections will be enabled automically when
configured.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>