staging: r8188eu: replace GetAddr1Ptr call in OnAction_p2p

Define a struct ieee80211_mgmt in OnAction_p2p and use it to check the
destination address. This replaces a call to the driver-specific
GetAddr1Ptr function.

Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com> # Edimax N150
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20221030173326.1588647-9-martin@kaiser.cx


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>