arm64: compat: Hook up io_pgetevents() for 32-bit tasks

Commit 73aeb2cb ("ARM: 8787/1: wire up io_pgetevents syscall")
hooked up the io_pgetevents() system call for 32-bit ARM, so we can
do the same for the compat wrapper on arm64.
Signed-off-by: Will Deacon <will.deacon@arm.com>

arch/arm64/include/asm/unistd.h

@@ -44,7 +44,7 @@
 #define __ARM_NR_compat_set_tls		(__ARM_NR_COMPAT_BASE + 5)
 #define __ARM_NR_COMPAT_END		(__ARM_NR_COMPAT_BASE + 0x800)
 
-#define __NR_compat_syscalls		399
+#define __NR_compat_syscalls		400
 #endif
 
 #define __ARCH_WANT_SYS_CLONE

arch/arm64/include/asm/unistd32.h

@@ -819,6 +819,8 @@ __SYSCALL(__NR_pkey_free, sys_pkey_free)
 __SYSCALL(__NR_statx, sys_statx)
 #define __NR_rseq 398
 __SYSCALL(__NR_rseq, sys_rseq)
+#define __NR_io_pgetevents 399
+__SYSCALL(__NR_io_pgetevents, compat_sys_io_pgetevents)
 
 /*
  * Please add new compat syscalls above this comment and update