microblaze: Wire-up renameat2 syscall

Add new renameat2 syscall.

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

arch/microblaze/include/uapi/asm/unistd.h

@@ -398,5 +398,6 @@
 #define __NR_finit_module	380
 #define __NR_sched_setattr	381
 #define __NR_sched_getattr	382
+#define __NR_renameat2		383
 
 #endif /* _UAPI_ASM_MICROBLAZE_UNISTD_H */

arch/microblaze/kernel/syscall_table.S

@@ -383,3 +383,4 @@ ENTRY(sys_call_table)
 	.long sys_finit_module		/* 380 */
 	.long sys_sched_setattr
 	.long sys_sched_getattr
+	.long sys_renameat2