brcmfmac: Make firmware path a module parameter

This patch makes firmware path a module parameter so that firmware and
nvram files can be loaded from the specified path.

Signed-off-by: Daniel Kim <dekim@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

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

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

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

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