recipeutils/get_recipe_upstream_version: pass ud.name instead of 'default'

recipeutils/get_recipe_upstream_version: pass ud.name instead of 'default'

While all but the osc fetcher ignore the third parameter of their
latest_revision implementation, 'default' isn't a valid name in general.

Since commit 2515fbd10824 ("fetch: Drop multiple branch/revision support
for single git urls") in bitbake a fetcher only handles a single
branch/revision and the only sensible thing to pass is `ud.name`.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>