nvme: Update nvme_scan_namespace to keep trying on busy

A busy controller shouldn't be game-over for all controllers,
so keep trying on hitting -EBUSY.

This change brings the actual behavior of the routine in line
with what the descriptions says.

Fixes: 982388eaa9 ("nvme: Add NVM Express driver support")
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Moritz Fischer <moritzf@google.com>

drivers/nvme/nvme.c

@@ -695,7 +695,9 @@ int nvme_scan_namespace(void)
 		if (ret) {
 			log_err("Failed to probe '%s': err=%dE\n", dev->name,
 				ret);
-			return ret;
+			/* Bail if we ran out of memory, else keep trying */
+			if (ret != -EBUSY)
+				return ret;
 		}
 	}