asm-generic: Add renameat2 syscall

Add the renameat2 syscall to the generic syscall list, which is used by the
following architectures: arc, arm64, c6x, hexagon, metag, openrisc, score,
tile, unicore32.

Signed-off-by: James Hogan <[e-mail]>
Acked-by: Arnd Bergmann <[e-mail]>
Signed-off-by: Miklos Szeredi <[e-mail]>
Cc: [e-mail]
Cc: Vineet Gupta <[e-mail]>
Cc: Catalin Marinas <[e-mail]>
Cc: Will Deacon <[e-mail]>
Cc: [e-mail]
Cc: Mark Salter <[e-mail]>
Cc: Aurelien Jacquiot <[e-mail]>
Cc: Richard Kuo <[e-mail]>
Cc: [e-mail]
Cc: [e-mail]
Cc: Jonas Bonn <[e-mail]>
Cc: Chen Liqin <[e-mail]>
Cc: Lennox Wu <[e-mail]>
Cc: Chris Metcalf <[e-mail]>
Cc: Guan Xuetao <[e-mail]>

include/uapi/asm-generic/unistd.h

···
 __SYSCALL(__NR_sched_setattr, sys_sched_setattr)
 #define __NR_sched_getattr 275
 __SYSCALL(__NR_sched_getattr, sys_sched_getattr)
+#define __NR_renameat2 276
+__SYSCALL(__NR_renameat2, sys_renameat2)
 
 #undef __NR_syscalls
-#define __NR_syscalls 276
+#define __NR_syscalls 277
 
 /*
  * All syscalls below here should go away really,