brcmfmac: always obtain device revision info upon intialization

Obtain device revision information and store it.

Reviewed-by: Hante Meuleman <meuleman@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

diff --cc drivers/net/wireless/brcm80211/brcmfmac/common.c
Simple merge

diff --cc drivers/net/wireless/brcm80211/brcmfmac/core.c
Simple merge

diff --cc drivers/net/wireless/brcm80211/brcmfmac/core.h
Simple merge