staging: rtl8712: Fix some tests against some 'data' subtype frames

staging: rtl8712: Fix some tests against some 'data' subtype frames

Commit 6e2baa44c6d1 ("staging: rtl8712: remove enum WIFI_FRAME_SUBTYPE")
was wrong because:
	WIFI_DATA_NULL != IEEE80211_STYPE_NULLFUNC
	WIFI_DATA_CFACK != IEEE80211_STYPE_DATA_CFACK
	WIFI_DATA_CFPOLL != IEEE80211_STYPE_DATA_CFPOLL
	WIFI_DATA_CFACKPOLL != IEEE80211_STYPE_DATA_CFACKPOLL

the WIFI_DATA_xxx definitions include WIFI_DATA_TYPE, which is 'BIT(3)'.
Restore the previous behavior by adding the missing
'IEEE80211_FTYPE_DATA |' (0x0008, that is to say BIT(3)) when these values
are used.

Hopefully, the wrong commit was small enough and hand review is possible.

Fixes: 6e2baa44c6d1 ("staging: rtl8712: remove enum WIFI_FRAME_SUBTYPE")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/44aebfa3c5ce8f45ae05369c73e9ff77c6d271f9.1619939806.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>