staging: rtl8821ae: fix sparse warning for static declarations

This commit fixes the following sparse warnings in ps.c:
  - 702: warning: symbol 'rtl_p2p_noa_ie' was not declared. Should it be static?
  - 802: warning: symbol 'rtl_p2p_action_ie' was not declared. Should it be static?

Signed-off-by: Marcus Farkas <marcus.farkas@finitebox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>