stand/uboot: Remove unneeded nitems definition

Also, remove the trailing white space that was introduced in the same
commit as the nitems fallback definition.

Sponsored by:		Netflix

stand/uboot/main.c

@@ -35,10 +35,6 @@
 #include "glue.h"
 #include "libuboot.h"
 
-#ifndef nitems
-#define	nitems(x)	(sizeof((x)) / sizeof((x)[0]))
-#endif
-
 #ifndef HEAP_SIZE
 #define	HEAP_SIZE	(2 * 1024 * 1024)
 #endif
@@ -50,7 +46,7 @@ int devs_no;
 uintptr_t uboot_heap_start;
 uintptr_t uboot_heap_end;
 
-struct device_type { 
+struct device_type {
 	const char *name;
 	int type;
 } device_types[] = {
@@ -336,7 +332,7 @@ get_load_device(int *type, int *unit, int *slice, int *partition)
 	*unit = -1;
 	*slice = D_SLICEWILD;
 	*partition = D_PARTWILD;
-} 
+}
 
 static void
 print_disk_probe_info(void)
@@ -365,7 +361,7 @@ print_disk_probe_info(void)
 }
 
 static int
-probe_disks(int devidx, int load_type, int load_unit, int load_slice, 
+probe_disks(int devidx, int load_type, int load_unit, int load_slice,
     int load_partition)
 {
 	int open_result, unit;
@@ -518,7 +514,7 @@ main(int argc, char **argv)
 
 		if ((load_type == DEV_TYP_NONE || (load_type & DEV_TYP_STOR)) &&
 		    strcmp(devsw[i]->dv_name, "disk") == 0) {
-			if (probe_disks(i, load_type, load_unit, load_slice, 
+			if (probe_disks(i, load_type, load_unit, load_slice,
 			    load_partition) == 0)
 				break;
 		}
@@ -634,7 +630,7 @@ handle_uboot_env_var(enum ubenv_action action, const char * var)
 	 * import the uboot variable ubname into the loader variable ldname,
 	 * otherwise the historical behavior is to import to uboot.ubname.
 	 */
-	if (action == UBENV_IMPORT) { 
+	if (action == UBENV_IMPORT) {
 		len = strcspn(var, "=");
 		if (len == 0) {
 			printf("name cannot start with '=': '%s'\n", var);