staging: atomisp: replace "&isp->asd[i]" with "asd" in __get_asd_from_port()

The address of isp->asd[i] is already assigned to
local "asd" variable. "&isp->asd[i]" would be replaced with
just "asd".

Signed-off-by: Daeseok Youn <daeseok.youn@gmail.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>