delete_module.2: Use syscall(SYS_...); for system calls without a wrapper

Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
diff --git a/man2/delete_module.2 b/man2/delete_module.2
index 174ef04..21c9e9d 100644
--- a/man2/delete_module.2
+++ b/man2/delete_module.2
@@ -28,12 +28,11 @@
 .SH SYNOPSIS
 .nf
 .BR "#include <fcntl.h>" "            /* Definition of " O_* " constants */"
+.BR "#include <sys/syscall.h>" "      /* Definition of " SYS_* " constants */"
+.BR "#include <unistd.h>
 .PP
-.BI "int delete_module(const char *" name ", unsigned int " flags );
+.BI "int syscall(SYS_delete_module, const char *" name ", unsigned int " flags );
 .fi
-.PP
-.IR Note :
-There is no glibc wrapper for this system call; see NOTES.
 .SH DESCRIPTION
 The
 .BR delete_module ()