ASoC: fsl: imx-hdmi: remove unused structure members

cppcheck warning:

sound/soc/fsl/imx-hdmi.c:21:16: style: struct member
'cpu_priv::sysclk_freq' is never used. [unusedStructMember]
 unsigned long sysclk_freq[2];
               ^

Additional checks show the sysclk_dir member is also not used.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20210219232937.6440-7-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/fsl/imx-hdmi.c

@@ -10,16 +10,12 @@
 
 /**
  * struct cpu_priv - CPU private data
- * @sysclk_freq: SYSCLK rates for set_sysclk()
- * @sysclk_dir: SYSCLK directions for set_sysclk()
  * @sysclk_id: SYSCLK ids for set_sysclk()
  * @slot_width: Slot width of each frame
  *
  * Note: [1] for tx and [0] for rx
  */
 struct cpu_priv {
-	unsigned long sysclk_freq[2];
-	u32 sysclk_dir[2];
 	u32 sysclk_id[2];
 	u32 slot_width;
 };