ASoC: ti: j721e-evm: Fix compiler warning when CONFIG_OF=n

Remove the use of of_match_ptr() macro for of_match_table to fix compiler
warning when CONFIG_OF=n:

sound/soc/ti/j721e-evm.c:528:34: warning: unused variable 'j721e_audio_of_match' [-Wunused-const-variable]
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/20200928074330.13029-1-peter.ujfalusi@ti.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/ti/j721e-evm.c

@@ -895,7 +895,7 @@ static struct platform_driver j721e_soc_driver = {
 	.driver = {
 		.name = "j721e-audio",
 		.pm = &snd_soc_pm_ops,
-		.of_match_table = of_match_ptr(j721e_audio_of_match),
+		.of_match_table = j721e_audio_of_match,
 	},
 	.probe = j721e_soc_probe,
 };