staging: wlan-ng: remove unnecessary helper function

staging: wlan-ng: remove unnecessary helper function

The function prism2sta_inf_handover() is called by the parent
function prism2sta_ev_info() to print a literal debug information
string using pr_debug(). The debugging utility function can be called
directly within prism2sta_ev_info().

Furthermore, to make the debugging more module-specific, the netdev_dbg()
function is preferred over the generic pr_debug() utility function.

Signed-off-by: Calvince Otieno <calvncce@gmail.com>
Link: https://lore.kernel.org/r/ZSzJuwlEKPBj9kLN@lab-ubuntu
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>