ARM: 8787/1: wire up io_pgetevents syscall

Wire up the new io_pgetevents syscall for ARM.
Signed-off-by: NStefan Agner <stefan@agner.ch>
Acked-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NRussell King <rmk+kernel@armlinux.org.uk>

arch/arm/tools/syscall.tbl

@@ -413,3 +413,4 @@
 396	common	pkey_free		sys_pkey_free
 397	common	statx			sys_statx
 398	common	rseq			sys_rseq
+399	common	io_pgetevents		sys_io_pgetevents