Fix compiling on FreeBSD + gcc - don't assume illmnos bits

This looks like it was once from the illumnos compat code.
FreeBSD doesn't have cmn_err as a compiler format attribute, so
it definitely errors out.

It doesn't show up on LLVM because it doesn't trigger.

Signed-off-by: adrian chadd <[email protected]>

Author: Adrian Chadd

include/os/freebsd/spl/sys/ccompile.h

@@ -56,21 +56,8 @@ extern "C" {
 #define	__sun_attr___VPRINTFLIKE__(__n)	\
 		__attribute__((__format__(printf, __n, 0)))
 
-/*
- * Handle the kernel printf routines that can take '%b' too
- */
-#if __GNUC_VERSION < 30402
-/*
- * XX64 at least this doesn't work correctly yet with 3.4.1 anyway!
- */
 #define	__sun_attr___KPRINTFLIKE__	__sun_attr___PRINTFLIKE__
 #define	__sun_attr___KVPRINTFLIKE__	__sun_attr___VPRINTFLIKE__
-#else
-#define	__sun_attr___KPRINTFLIKE__(__n)	\
-		__attribute__((__format__(cmn_err, __n, (__n)+1)))
-#define	__sun_attr___KVPRINTFLIKE__(__n) \
-		__attribute__((__format__(cmn_err, __n, 0)))
-#endif
 
 /*
  * This one's pretty obvious -- the function never returns