CS7000: radio: fix frequency drift of first M17 TX after power on

platform/drivers/baseband/HR_C6000_CS7000.cpp

@@ -200,7 +200,7 @@ void HR_Cx000< M >::fmMode()
     writeReg(M::CONFIG, 0xE0, 0x83); // CPU controls the codec, Mic_p enabled, HR_C6000 is I2S slave
     writeReg(M::CONFIG, 0x36, 0x10); // Vocoder codec packet interface enabled
     writeReg(M::CONFIG, 0x36, 0x12); // Receiving and opening the voice channel in FM mode Codec switch, 1 means on, 0 means off.
-    writeReg(M::CONFIG, 0xE0, 0x8B);
+    writeReg(M::CONFIG, 0xE0, 0xC9); // Codec enabled, LineIn1, LineOut2, I2S slave mode
     writeReg(M::CONFIG, 0x26, 0xFE); // Undocumented register, disable FM audio output
 }