microblaze: Wire-up new system calls sched_setattr/getattr

Wire-up sched_setattr/getattr syscalls.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>

diff --cc arch/microblaze/include/uapi/asm/unistd.h
Simple merge

diff --cc arch/microblaze/kernel/syscall_table.S
Simple merge