ASoC: allow drivers to compile both static and dynamic

Based on where the code is synced the driver should allow
both static and dynamic linked compilation.
Also remove __exit for modules loaded from another common
init/exit functions.

Change-Id: Ib58f152002aba3af4446f9bbd9b82c279212bd0a
Signed-off-by: Asish Bhattacharya <asishb@codeaurora.org>

dsp/audio_calibration.c

@@ -609,7 +609,7 @@ int __init audio_cal_init(void)
 	return misc_register(&audio_cal_misc);
 }
 
-void __exit audio_cal_exit(void)
+void audio_cal_exit(void)
 {
 	int i = 0;
 	struct list_head *ptr, *next;