ASoC: intel: cht_bsw_rt5645: Replace GFP_ATOMIC with GFP_KERNEL in snd_cht_mc_probe

snd_cht_mc_probe() is never called in atomic context.
This function is only set as ".probe" in "struct platform_driver".

Despite never getting called from atomic context,
snd_cht_mc_probe() calls devm_kzalloc() with GFP_ATOMIC,
which waits busily for allocation.
GFP_ATOMIC is not necessary and can be replaced with GFP_KERNEL,
to avoid busy waiting and improve the possibility of sucessful allocation.

This is found by a static analysis tool named DCNS written by myself.
Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/intel/boards/cht_bsw_rt5645.c

@@ -539,7 +539,7 @@ static int snd_cht_mc_probe(struct platform_device *pdev)
 	int ret_val = 0;
 	int i;
 
-	drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_ATOMIC);
+	drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL);
 	if (!drv)
 		return -ENOMEM;