ASoC: Intel: Rename broadwell source file to bdw_rt286

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/20220620101402.2684366-9-cezary.rojewski@intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/intel/boards/Makefile

@@ -2,7 +2,7 @@
 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
+snd-soc-sst-broadwell-objs := bdw_rt286.o
 snd-soc-sst-bxt-da7219_max98357a-objs := bxt_da7219_max98357a.o
 snd-soc-sst-bxt-rt298-objs := bxt_rt298.o
 snd-soc-sst-sof-pcm512x-objs := sof_pcm512x.o