audio-hal: soft step volume params controls

set/get soft step volume control params values dynamically
for each usecase. each usecase can set different params values.
these values are set to module through mixer command.

Change-Id: I8ae200046ca5ab1ce253fc43e241d794fbb52183
Signed-off-by: Krishna Kishor Jha <quic_kkishorj@quicinc.com>
diff --git a/hal/platform_api.h b/hal/platform_api.h
old mode 100644
new mode 100755
index bea9675..805db2f
--- a/hal/platform_api.h
+++ b/hal/platform_api.h
@@ -15,6 +15,41 @@
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 #ifndef AUDIO_PLATFORM_API_H
@@ -440,4 +475,8 @@
 void platform_reset_island_power_status(void *platform, snd_device_t snd_device);
 void platform_is_volume_boost_supported_device(void *platform, struct listnode *devices);
 const char *platform_get_mixer_FM_RX_control(struct audio_device *adev);
+#ifdef SOFT_VOLUME
+int platform_set_soft_step_volume_params(int uc_id, int period, int step, int curve);
+int platform_get_soft_step_volume_params(struct soft_step_volume_params *volume_params, int uc_id);
+#endif
 #endif // AUDIO_PLATFORM_API_H