Add U-Boot SPI support for the RK3328 Signed-off-by: Johannes Krottmayer <krjdev@gmail.com> Cc: Kever Yang <kever.yang@rock-chips.com> Cc: Jagan Teki <jagan@amarulasolutions.com> Reviewed-by: Kever Yang <kever.yang@rock-chips.com> (fix checkpatch error for code ident) Signed-off-by: Kever Yang <kever.yang@rock-chips.com>