ASoC: Intel: Rename haswell source file to hsw_rt5640

Rename source file to drop any ambiguity.
Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Reviewed-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Tested-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20220620101402.2684366-2-cezary.rojewski@intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/intel/boards/Makefile

 # SPDX-License-Identifier: GPL-2.0-only
-snd-soc-sst-haswell-objs := haswell.o
+snd-soc-sst-haswell-objs := hsw_rt5640.o
 snd-soc-sst-bdw-rt5650-mach-objs := bdw-rt5650.o
 snd-soc-sst-bdw-rt5677-mach-objs := bdw-rt5677.o
 snd-soc-sst-broadwell-objs := broadwell.o