解決msm8953 mic 錄音底噪問題

--- a/kernel/msm-3.18/arch/arm/boot/dts/qcom/msm-audio.dtsi
+++ b/kernel/msm-3.18/arch/arm/boot/dts/qcom/msm-audio.dtsi
@@ -323,12 +323,12 @@
                        "RX_BIAS", "MCLK",
                        "SPK_RX_BIAS", "MCLK",
                        "INT_LDO_H", "MCLK",
-                       "MIC BIAS Internal1", "Handset Mic",
+                       "MIC BIAS External", "Handset Mic",
                        "MIC BIAS Internal2", "Headset Mic",
-                       "MIC BIAS Internal1", "Secondary Mic",
-                       "AMIC1", "MIC BIAS Internal1",
+                       "MIC BIAS External", "Secondary Mic",
+                       "AMIC1", "MIC BIAS External",
                        "AMIC2", "MIC BIAS Internal2",
-                       "AMIC3", "MIC BIAS Internal1";
+                       "AMIC3", "MIC BIAS External";

Note：

       msm8953 不知道爲什麼MIC錄音使用內部MIC_BIAS會有底噪，改爲使用外部MIC_BIAS底噪消失。