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

@@ -29,23 +29,22 @@
  * $FreeBSD$
  */
 
-#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>
 
-/* 
+/*
  * Global pointer to a string that is used to avoid an errorneous free in
  * gctl_free.
  */
@@ -172,7 +171,7 @@ gctl_param_add(struct gctl_req *req, const char *name, int len, void *value,
 		ap->len = len;
 	else if (len < 0) {
 		ap->flag |= GCTL_PARAM_ASCII;
-		ap->len = strlen(value) + 1;	
+		ap->len = strlen(value) + 1;
 	}
 }