ASoC: SOF: (cosmetic) use the "bool" type where it makes sense

Several fields in struct snd_sof_dev are used as boolean flags, use
the "bool" type for them.
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Signed-off-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200824200912.46852-3-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/sof-priv.h

@@ -370,7 +370,7 @@ struct snd_sof_dev {
 	/* DSP firmware boot */
 	wait_queue_head_t boot_wait;
 	enum snd_sof_fw_state fw_state;
-	u32 first_boot;
+	bool first_boot;
 
 	/* work queue in case the probe is implemented in two steps */
 	struct work_struct probe_work;
@@ -431,10 +431,10 @@ struct snd_sof_dev {
 	int dma_trace_pages;
 	wait_queue_head_t trace_sleep;
 	u32 host_offset;
-	u32 dtrace_is_supported; /* set with Kconfig or module parameter */
-	u32 dtrace_is_enabled;
-	u32 dtrace_error;
-	u32 dtrace_draining;
+	bool dtrace_is_supported; /* set with Kconfig or module parameter */
+	bool dtrace_is_enabled;
+	bool dtrace_error;
+	bool dtrace_draining;
 
 	bool msi_enabled;