Continuing the effort started in r343701, #ifdef cleanup, checking for

__FreeBSD_version > 3.0 and 5.0 is redundant.

MFC after:	3 days

sys/contrib/ipfilter/netinet/ip_compat.h

@@ -126,7 +126,7 @@
  * There may be other, safe, kernels but this is not extensively tested yet.
  */
 #   define HAVE_M_PULLDOWN
-#  if !defined(IPFILTER_LKM) && (__FreeBSD_version >= 300000)
+#  if !defined(IPFILTER_LKM) && defined(__FreeBSD_version)
 #   include "opt_ipfilter.h"
 #  endif
 #  define	COPYIN(a,b,c)	copyin((caddr_t)(a), (caddr_t)(b), (c))

sys/contrib/ipfilter/netinet/ip_fil.h

@@ -1420,8 +1420,7 @@ typedef	struct	ipftune	{
 ** HPUX Port
 */
 
-#if !defined(CDEV_MAJOR) && defined (__FreeBSD_version) && \
-    (__FreeBSD_version >= 220000)
+#if !defined(CDEV_MAJOR) && defined (__FreeBSD_version)
 # define	CDEV_MAJOR	79
 #endif
 

sys/contrib/ipfilter/netinet/ip_proxy.c

@@ -51,7 +51,7 @@
 # include <sys/stream.h>
 # include <sys/kmem.h>
 #endif
-#if __FreeBSD_version >= 300000
+#ifdef __FreeBSD_version
 # include <sys/queue.h>
 #endif
 #include <net/if.h>

sys/contrib/ipfilter/netinet/ip_state.c

@@ -82,7 +82,7 @@
 #ifdef	USE_INET6
 #include <netinet/icmp6.h>
 #endif
-#if FREEBSD_GE_REV(300000)
+#ifdef __FreeBSD_version
 # include <sys/malloc.h>
 # if defined(_KERNEL) && !defined(IPFILTER_LKM)
 #  include <sys/libkern.h>
@@ -307,7 +307,7 @@ ipf_state_seed_alloc(u_int state_size, u_int state_max)
 		/*
 		 * XXX - ipf_state_seed[X] should be a random number of sorts.
 		 */
-#if  FREEBSD_GE_REV(400000)
+#ifdef __FreeBSD_version
 		state_seed[i] = arc4random();
 #else
 		state_seed[i] = ((u_long)state_seed + i) * state_size;

sys/contrib/ipfilter/netinet/ip_sync.c

@@ -30,7 +30,7 @@
 #  include <sys/mbuf.h>
 # endif
 # include <sys/select.h>
-# if __FreeBSD_version >= 500000
+# ifdef __FreeBSD_version
 #  include <sys/selinfo.h>
 # endif
 #endif