hal: Enhance VoIP call auto recovery if SSR occurs during call

Enhance support for VoIP auto recovery if SSR occurs during
the VoIP call.

CRs-Fixed: 689087
Change-Id: Id69cb9d17fc78fd98754b19bf84539290ff54cd9
diff --git a/hal/audio_hw.c b/hal/audio_hw.c
index 247918f..0ad9428 100644
--- a/hal/audio_hw.c
+++ b/hal/audio_hw.c
@@ -275,7 +275,7 @@
     return 0;
 }
 
-static int get_snd_card_state(struct audio_device *adev)
+int get_snd_card_state(struct audio_device *adev)
 {
     int snd_scard_state;