hal: changes to support 24 bit record

-Changes to support 24 bit record if input format request is
 AUDIO_FORMAT_PCM_8_24_BIT or AUDIO_FORMAT_PCM_24_BIT_PACKED

Change-Id: I68076524ccccbf9f0be3c88bb01180ae7e4fd8b1
diff --git a/hal/msm8916/platform.h b/hal/msm8916/platform.h
index 23435ea..9380561 100644
--- a/hal/msm8916/platform.h
+++ b/hal/msm8916/platform.h
@@ -189,6 +189,7 @@
 #define MAX_PORT                        6
 #define ALL_CODEC_BACKEND_PORT          0
 #define HEADPHONE_44_1_BACKEND_PORT     5
+#define MAX_CODEC_TX_BACKENDS           1
 enum {
     DEFAULT_CODEC_BACKEND,
     SLIMBUS_0_RX = DEFAULT_CODEC_BACKEND,
@@ -239,10 +240,6 @@
 #define AUDIO_CAPTURE_PERIOD_DURATION_MSEC 20
 #define AUDIO_CAPTURE_PERIOD_COUNT 2
 
-#define LOW_LATENCY_CAPTURE_SAMPLE_RATE 48000
-#define LOW_LATENCY_CAPTURE_PERIOD_SIZE 240
-#define LOW_LATENCY_CAPTURE_USE_CASE 1
-
 #define DEVICE_NAME_MAX_SIZE 128
 #define HW_INFO_ARRAY_MAX_SIZE 32