dhd_bus.h is the header file for bus interface. Move functions
declarations and brcmf_bus structure to there. This is part of
the fullmac bus interface refactoring.
Reviewed-by: NPieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: NArend van Spriel <arend@broadcom.com>
Reviewed-by: NAlwin Beukers <alwin@broadcom.com>
Signed-off-by: NFranky Lin <frankyl@broadcom.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>