mpi/amd64: remove extra 'ret' from assembly functions
* mpi/amd64/mpih-add1.S: Remove 'ret' as it is already included by FUNC_EXIT macro. * mpi/amd64/mpih-lshift.S: Likewise. * mpi/amd64/mpih-mul1.S: Likewise. * mpi/amd64/mpih-mul2.S: Likewise. * mpi/amd64/mpih-mul3.S: Likewise. * mpi/amd64/mpih-rshift.S: Likewise. * mpi/amd64/mpih-sub1.S: Likewise.
- Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>