ARM: wire up memfd_create syscall

Add the memfd_create syscall to ARM.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

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

@@ -411,6 +411,7 @@
 #define __NR_renameat2			(__NR_SYSCALL_BASE+382)
 #define __NR_seccomp			(__NR_SYSCALL_BASE+383)
 #define __NR_getrandom			(__NR_SYSCALL_BASE+384)
+#define __NR_memfd_create		(__NR_SYSCALL_BASE+385)
 
 /*
  * The following SWIs are ARM private.

arch/arm/kernel/calls.S

@@ -394,6 +394,7 @@
 		CALL(sys_renameat2)
 		CALL(sys_seccomp)
 		CALL(sys_getrandom)
+/* 385 */	CALL(sys_memfd_create)
 #ifndef syscalls_counted
 .equ syscalls_padding, ((NR_syscalls + 3) & ~3) - NR_syscalls
 #define syscalls_counted