hal: Derive snd_device properly while sending app_type_config

Derive snd_device using platform_get_spkr_prot_snd_device without
checking for a specfic snd_device as the check is implicitly
handled in the function. Update the hw_interface for all the
speaker protected devices from SLIMBUS_4_TX to SLIMBUS_0_RX.

CRs-Fixed: 2019861
Change-Id: I01dbc585013e4943257873bc8650397c92de4842
diff --git a/hal/audio_extn/utils.c b/hal/audio_extn/utils.c
index 5d98ee1..7179892 100644
--- a/hal/audio_extn/utils.c
+++ b/hal/audio_extn/utils.c
@@ -838,8 +838,7 @@
         rc = -EINVAL;
         goto exit_send_app_type_cfg;
     }
-    snd_device = (snd_device == SND_DEVICE_OUT_SPEAKER) ?
-                 platform_get_spkr_prot_snd_device(snd_device) : snd_device;
+    snd_device = platform_get_spkr_prot_snd_device(snd_device);
 
     acdb_dev_id = platform_get_snd_device_acdb_id(snd_device);
     if (acdb_dev_id <= 0) {