Fix redefinition of ioperm and iopl in stubs.c and arm/{ioperm.c,iopl.c}

Fix redefinition of ioperm and iopl in stubs.c and arm/{ioperm.c,iopl.c}

This fixes the following link failure:

  LD libuClibc-0.9.33.so
libc/libc_so.a(stubs.os): In function `sync_file_range':
stubs.c:(.text+0x0): multiple definition of `ioperm'
libc/libc_so.a(ioperm.os):ioperm.c:(.text+0x260): first defined here
libc/libc_so.a(stubs.os): In function `sync_file_range':
stubs.c:(.text+0x0): multiple definition of `iopl'
libc/libc_so.a(iopl.os):iopl.c:(.text+0x0): first defined here
collect2: ld returned 1 exit status
make[1]: *** [lib/libc.so] Error 1

Signed-off-by: Jason Woodward <jason.woodward@timesys.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>