ethernet: tundra: free irq when alloc ring failed in tsi108_open()

When alloc tx/rx ring failed in tsi108_open(), it doesn't free irq. Fix
it.

Fixes: 5e123b84

 ("[PATCH] Add tsi108/9 On Chip Ethernet device driver support")
Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
Link: https://lore.kernel.org/r/20221109044016.126866-1-shaozhengchao@huawei.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>