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>
diff --git a/asoc/msm-pcm-loopback-v2.c b/asoc/msm-pcm-loopback-v2.c
index e50a005..1c26d19 100644
--- a/asoc/msm-pcm-loopback-v2.c
+++ b/asoc/msm-pcm-loopback-v2.c
@@ -790,7 +790,7 @@
 	return platform_driver_register(&msm_pcm_driver);
 }
 
-void __exit msm_pcm_loopback_exit(void)
+void msm_pcm_loopback_exit(void)
 {
 	platform_driver_unregister(&msm_pcm_driver);
 }