ia64: add statx and io_pgetevents syscalls

All architectures should implement these two, so assign numbers
and hook them up on ia64.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/ia64/kernel/syscalls/syscall.tbl

@@ -335,3 +335,5 @@
 323	common	copy_file_range			sys_copy_file_range
 324	common	preadv2				sys_preadv2
 325	common	pwritev2			sys_pwritev2
+326	common	statx				sys_statx
+327	common	io_pgetevents			sys_io_pgetevents