bootstd: Use bootdev instead of bootdevice

It seems better to call this a 'bootdev' since this is name used in the
documentation. The older 'Bootdevice' name is no-longer used and may cause
confusion with the 'bootdevice' environment variable.

Update throughout to use bootdev.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/boot/bootflow.c b/boot/bootflow.c
index 8f2cb87..487552f 100644
--- a/boot/bootflow.c
+++ b/boot/bootflow.c
@@ -315,14 +315,14 @@
 
 	/* If we got a valid bootflow, return it */
 	if (!ret) {
-		log_debug("Bootdevice '%s' part %d method '%s': Found bootflow\n",
+		log_debug("Bootdev '%s' part %d method '%s': Found bootflow\n",
 			  dev->name, iter->part, iter->method->name);
 		return 0;
 	}
 
 	/* Unless there is nothing more to try, move to the next device */
 	else if (ret != BF_NO_MORE_PARTS && ret != -ENOSYS) {
-		log_debug("Bootdevice '%s' part %d method '%s': Error %d\n",
+		log_debug("Bootdev '%s' part %d method '%s': Error %d\n",
 			  dev->name, iter->part, iter->method->name, ret);
 		/*
 		 * For 'all' we return all bootflows, even