ffi.c (ffi_prep_args): Take account into the alignement for the register size.
* src/sh/ffi.c (ffi_prep_args): Take account into the alignement
for the register size.
(ffi_closure_helper_SYSV): Handle the structure return value
address correctly.
(ffi_closure_helper_SYSV): Return the appropriate type when
the registers are used for the structure return value.
* src/sh/sysv.S (ffi_closure_SYSV): Fix the stack layout for
the 64-bit return value. Update copyright years.