enter/exit download state routine is going to diverge with new ARM core
introduced. Move corresponding code to sdio_chip.c for new ARM core support.
Reviewed-by: NArend van Spriel <arend@broadcom.com>
Reviewed-by: NPieter-Paul Giesberts <pieterpg@broadcom.com>
Signed-off-by: NFranky Lin <frankyl@broadcom.com>
Signed-off-by: NArend van Spriel <arend@broadcom.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>