drivers/staging/wlags49_h2/wl_pci.c: add missing wl_device_dealloc and wl_remove

The need for wl_device_dealloc is motivated by the error-handling code for
the failure of wl_adapter_insert.  The need for wl_remove in the third case
is motivated by the code in the definition of wl_pci_remove.

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>