wifi: ipw2200: fix memory leak in ipw_wdev_init()

In the Linux kernel, the following vulnerability has been resolved:

wifi: ipw2200: fix memory leak in ipw_wdev_init()

In the error path of ipw_wdev_init(), exception value is returned, and

the memory applied for in the function is not released. Also the memory

is not released in ipw_pci_probe(). As a result, memory leakage occurs.

So memory release needs to be added to the error path of ipw_wdev_init().