ASoC: SOF: Intel: lnl: Add fw_regs area to debugfs map

Expose the firmware registers via debugfs. it can be of great help while
debugging complex issues.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://msgid.link/r/20240409113349.21623-4-peter.ujfalusi@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/intel/lnl.c

@@ -28,6 +28,7 @@ static const struct snd_sof_debugfs_map lnl_dsp_debugfs[] = {
 	{"hda", HDA_DSP_HDA_BAR, 0, 0x4000, SOF_DEBUGFS_ACCESS_ALWAYS},
 	{"pp", HDA_DSP_PP_BAR,  0, 0x1000, SOF_DEBUGFS_ACCESS_ALWAYS},
 	{"dsp", HDA_DSP_BAR,  0, 0x10000, SOF_DEBUGFS_ACCESS_ALWAYS},
+	{"fw_regs", HDA_DSP_BAR,  MTL_SRAM_WINDOW_OFFSET(0), 0x1000, SOF_DEBUGFS_ACCESS_D0_ONLY},
 };
 
 /* this helps allows the DSP to setup DMIC/SSP */