sys/dev/md: cleanup includes

Remove twice included but unneeded explicit sys/param.h.  Sort.

Sponsored by:	The FreeBSD Foundation
MFC after:	3 days

sys/dev/md/md.c

@@ -60,12 +60,13 @@
 #include "opt_geom.h"
 #include "opt_md.h"
 
-#include <sys/param.h>
 #include <sys/systm.h>
 #include <sys/bio.h>
 #include <sys/buf.h>
+#include <sys/bus.h>
 #include <sys/conf.h>
 #include <sys/devicestat.h>
+#include <sys/disk.h>
 #include <sys/fcntl.h>
 #include <sys/kernel.h>
 #include <sys/kthread.h>
@@ -76,11 +77,11 @@
 #include <sys/mdioctl.h>
 #include <sys/mount.h>
 #include <sys/mutex.h>
-#include <sys/sx.h>
 #include <sys/namei.h>
 #include <sys/proc.h>
 #include <sys/queue.h>
 #include <sys/rwlock.h>
+#include <sys/sx.h>
 #include <sys/sbuf.h>
 #include <sys/sched.h>
 #include <sys/sf_buf.h>
@@ -88,9 +89,6 @@
 #include <sys/uio.h>
 #include <sys/unistd.h>
 #include <sys/vnode.h>
-#include <sys/disk.h>
-#include <sys/param.h>
-#include <sys/bus.h>
 
 #include <geom/geom.h>
 #include <geom/geom_int.h>