sysutils/py-psutil: Fix failing __FreeBSD_version check

- Bump PORTREVISION for package change

psutil 5.9.1 does not include <sys/param.h> in arch/freebsd/mem.c, causing the
__FreeBSD_version check there not not work properly and thus breaking the port
on systems without COMPAT_FREEBSD7.

PR:		264807
Reference:	https://github.com/giampaolo/psutil/issues/2113

sysutils/py-psutil/Makefile

@@ -2,6 +2,7 @@
 
 PORTNAME=	psutil
 PORTVERSION=	5.9.1
+PORTREVISION=	1
 CATEGORIES=	sysutils python
 MASTER_SITES=	CHEESESHOP
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}

sysutils/py-psutil/files/patch-psutil_arch_freebsd_mem.c

@@ -0,0 +1,10 @@
+--- psutil/arch/freebsd/mem.c.orig	2022-01-17 12:10:50 UTC
++++ psutil/arch/freebsd/mem.c
+@@ -6,6 +6,7 @@
+ 
+ 
+ #include <Python.h>
++#include <sys/param.h>
+ #include <sys/sysctl.h>
+ #include <sys/vmmeter.h>
+ #include <vm/vm_param.h>