Minor style(9) fixups

Delete trailing whitespace and sort headers.

Leave libgeom.h's placement alone, per reasoning in r317289.

MFC after:	5 weeks
Sponsored by:	Dell EMC Isilon

lib/libgeom/geom_ctl.c

@@ -29,18 +29,17 @@
  * $FreeBSD$
  */
 
-#include <stdio.h>
+#include <sys/types.h>
+#include <sys/queue.h>
 #include <fcntl.h>
 #include <errno.h>
-#include <stdint.h>
-#include <sys/types.h>
-#include <stdarg.h>
-#include <unistd.h>
-#include <string.h>
-#include <stdlib.h>
 #include <paths.h>
-
-#include <sys/queue.h>
+#include <stdarg.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
 
 #define GCTL_TABLE 1
 #include <libgeom.h>