microblaze: Add missing syscalls

The patch adds new syscalls copy_file_range,
preadv2, pwritev2, pkey_mprotect, pkey_alloc,
pkey_free

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/arch/microblaze/include/asm/unistd.h b/arch/microblaze/include/asm/unistd.h
index 805ae5d..032fed7 100644
--- a/arch/microblaze/include/asm/unistd.h
+++ b/arch/microblaze/include/asm/unistd.h
@@ -38,6 +38,6 @@
 
 #endif /* __ASSEMBLY__ */
 
-#define __NR_syscalls         392
+#define __NR_syscalls         398
 
 #endif /* _ASM_MICROBLAZE_UNISTD_H */