remove compat_sys_mount

Hi Al,

this series moves the NFSv4 binary mount data compat handling to fs/nfs/,
and removes the now pointless compat_sys_mount.

Diffstat:
 b/arch/alpha/kernel/osf_sys.c                        |  116 +++--------
 b/arch/arm64/include/asm/unistd32.h                  |    2 
 b/arch/mips/kernel/syscalls/syscall_n32.tbl          |    2 
 b/arch/mips/kernel/syscalls/syscall_o32.tbl          |    2 
 b/arch/parisc/kernel/syscalls/syscall.tbl            |    2 
 b/arch/powerpc/kernel/syscalls/syscall.tbl           |    2 
 b/arch/s390/kernel/syscalls/syscall.tbl              |    2 
 b/arch/sparc/kernel/syscalls/syscall.tbl             |    2 
 b/arch/x86/entry/syscalls/syscall_32.tbl             |    2 
 b/fs/Makefile                                        |    1 
 b/fs/internal.h                                      |    3 
 b/fs/namespace.c                                     |   29 --
 b/fs/nfs/fs_context.c                                |  195 ++++++++++++-------
 b/include/linux/compat.h                             |    6 
 b/include/linux/fs.h                                 |    2 
 b/include/uapi/asm-generic/unistd.h                  |    2 
 b/tools/include/uapi/asm-generic/unistd.h            |    2 
 b/tools/perf/arch/powerpc/entry/syscalls/syscall.tbl |    2 
 b/tools/perf/arch/s390/entry/syscalls/syscall.tbl    |    2 
 fs/compat.c                                          |  132 ------------
 20 files changed, 179 insertions(+), 329 deletions(-)