hal: Detect sound card dynamically

- HAL always assumed SOUND_CARD/MIXER_CARD
  number to be zero. This could cause HAL
  not to load when some other card is
  detected earlier to HAL.
- Fix by removing these Macro(s) and reading
  correct sound card number runtime while loading
- Corrected its use cases across HAL replacing it
  with appropriate platform API

CRs-fixed: 580226

Change-Id: I4512e4a2f7f81d8415c3ba8ec393c96867e6d69a
diff --git a/hal/audio_extn/hfp.c b/hal/audio_extn/hfp.c
index e0bdc52..6b0546a 100644
--- a/hal/audio_extn/hfp.c
+++ b/hal/audio_extn/hfp.c
@@ -113,8 +113,8 @@
               __func__, pcm_dev_rx_id, pcm_dev_tx_id, uc_info->id);
 
     ALOGV("%s: Opening PCM playback device card_id(%d) device_id(%d)",
-          __func__, SOUND_CARD, pcm_dev_rx_id);
-    hfpmod.hfp_sco_rx = pcm_open(SOUND_CARD,
+          __func__, adev->snd_card, pcm_dev_rx_id);
+    hfpmod.hfp_sco_rx = pcm_open(adev->snd_card,
                                   pcm_dev_asm_rx_id,
                                   PCM_OUT, &pcm_config_hfp);
     if (hfpmod.hfp_sco_rx && !pcm_is_ready(hfpmod.hfp_sco_rx)) {
@@ -123,8 +123,8 @@
         goto exit;
     }
     ALOGD("%s: Opening PCM capture device card_id(%d) device_id(%d)",
-          __func__, SOUND_CARD, pcm_dev_tx_id);
-    hfpmod.hfp_pcm_rx = pcm_open(SOUND_CARD,
+          __func__, adev->snd_card, pcm_dev_tx_id);
+    hfpmod.hfp_pcm_rx = pcm_open(adev->snd_card,
                                    pcm_dev_rx_id,
                                    PCM_OUT, &pcm_config_hfp);
     if (hfpmod.hfp_pcm_rx && !pcm_is_ready(hfpmod.hfp_pcm_rx)) {
@@ -132,7 +132,7 @@
         ret = -EIO;
         goto exit;
     }
-    hfpmod.hfp_sco_tx = pcm_open(SOUND_CARD,
+    hfpmod.hfp_sco_tx = pcm_open(adev->snd_card,
                                   pcm_dev_asm_tx_id,
                                   PCM_IN, &pcm_config_hfp);
     if (hfpmod.hfp_sco_tx && !pcm_is_ready(hfpmod.hfp_sco_tx)) {
@@ -141,8 +141,8 @@
         goto exit;
     }
     ALOGV("%s: Opening PCM capture device card_id(%d) device_id(%d)",
-          __func__, SOUND_CARD, pcm_dev_tx_id);
-    hfpmod.hfp_pcm_tx = pcm_open(SOUND_CARD,
+          __func__, adev->snd_card, pcm_dev_tx_id);
+    hfpmod.hfp_pcm_tx = pcm_open(adev->snd_card,
                                    pcm_dev_tx_id,
                                    PCM_IN, &pcm_config_hfp);
     if (hfpmod.hfp_pcm_tx && !pcm_is_ready(hfpmod.hfp_pcm_tx)) {