ASoC: TPA6130A2: Make tpa6130a2_power as static

The power for the amplifier should be handled internally
by the tpa6130a2 driver.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/codecs/tpa6130a2.h

@@ -57,6 +57,5 @@
 #define TPA6130A2_VERSION_MASK		(0x0f)
 
 extern int tpa6130a2_add_controls(struct snd_soc_codec *codec);
-extern void tpa6130a2_power(int power);
 
 #endif /* __TPA6130A2_H__ */