staging: greybus: tools: Fix braces {} style

This patch fixes the check reported by checkpatch.pl
for braces {} should be used on all arms of this statement.
Signed-off-by: Simran Singhal <singhalsimran0@gmail.com>
Reviewed-by: Alex Elder <elder@linaro.org>
Link: https://lore.kernel.org/r/20200322173045.GA24700@simran-Inspiron-5558Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/greybus/tools/loopback_test.c

@@ -802,8 +802,9 @@ static void prepare_devices(struct loopback_test *t)
 			write_sysfs_val(t->devices[i].sysfs_entry,
 					"outstanding_operations_max",
 					t->async_outstanding_operations);
-		} else
+		} else {
 			write_sysfs_val(t->devices[i].sysfs_entry, "async", 0);
+		}
 	}
 }