staging: wfx: relocate LINK_ID_NO_ASSOC and MAX_STA_IN_AP_MODE to hif API

The definitions LINK_ID_NO_ASSOC and MAX_STA_IN_AP_MODE are imposed by
the hardware. Therefore, they should be located in the hardware
interface API.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20200406111756.154086-3-Jerome.Pouiller@silabs.com


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