staging: r8188eu: use ieee80211 helper for qos bit

Use the ieee80211_is_data_qos helper function to read the qos bit.

This helper function returns a bool. Change the qos field in struct
rx_pkt_attrib from u8 to bool and fix up the other places where it
is used.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20220227164147.1168847-5-martin@kaiser.cx


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