avr32: wire up missing syscalls

This patch adds three missing syscalls to AVR32:
__NR_userfaultfd
__NR_membarrier
__NR_mlock2
Signed-off-by: NHans-Christian Egtvedt <egtvedt@samfundet.no>

arch/avr32/include/uapi/asm/unistd.h

@@ -334,5 +334,8 @@
 #define __NR_bpf		319
 #define __NR_execveat		320
 #define __NR_accept4		321
+#define __NR_userfaultfd	322
+#define __NR_membarrier		323
+#define __NR_mlock2		324
 
 #endif /* _UAPI__ASM_AVR32_UNISTD_H */

arch/avr32/kernel/syscall_table.S

@@ -335,4 +335,7 @@ sys_call_table:
 	.long	sys_bpf
 	.long	sys_execveat		/* 320 */
 	.long	sys_accept4
+	.long	sys_userfaultfd
+	.long	sys_membarrier
+	.long	sys_mlock2
 	.long	sys_ni_syscall		/* r8 is saturated at nr_syscalls */