i2c functions moved from power.cpp to i2c.cpp

include/i2c.h

@@ -14,5 +14,7 @@
 void i2c_init(void);
 void i2c_deinit(void);
 int i2c_scan(void);
+uint8_t i2c_readBytes(uint8_t addr, uint8_t reg, uint8_t *data, uint8_t len);
+uint8_t i2c_writeBytes(uint8_t addr, uint8_t reg, uint8_t *data, uint8_t len);
 
 #endif

include/power.h

@@ -22,8 +22,6 @@ void AXP192_powerevent_IRQ(void);
 void AXP192_power(pmu_power_t powerlevel);
 void AXP192_init(void);
 void AXP192_showstatus(void);
-uint8_t i2c_writeBytes(uint8_t addr, uint8_t reg, uint8_t *data, uint8_t len);
-uint8_t i2c_readBytes(uint8_t addr, uint8_t reg, uint8_t *data, uint8_t len);
 
 #endif // HAS_PMU