Fix cppcheck warning:

sound/soc/intel/haswell/sst-haswell-ipc.c:963:8: style:inconclusive:
Function 'sst_hsw_stream_new' argument 3 names different: declaration
'get_write_position' definition
'notify_position'. [funcArgNamesDifferent]
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200813200147.61990-15-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>