i2c: ali1535: Fix an error handling path in ali1535_probe()

If i2c_add_adapter() fails, the request_region() call in ali1535_setup()
must be undone by a corresponding release_region() call, as done in the
remove function.

Fixes: 1da177e4 ("Linux-2.6.12-rc2")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
Link: https://lore.kernel.org/r/0daf63d7a2ce74c02e2664ba805bbfadab7d25e5.1741031571.git.christophe.jaillet@wanadoo.fr