staging: r8188eu: Remove broken rtw_p2p_get function.

Removes broken and unsafe rtw_p2p_get function and all of the code
associated with it from the r8188eu driver.

Signed-off-by: Charlie Sands <charlies256@protonmail.com>
Link: https://lore.kernel.org/r/Ymy7C/A2q+VzfBhO@sckzor-linux.localdomain


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