Hide log_v behind conditional define, reduce excessive logging (espressif#2641)

@cyberman54 from espressif#2250 recommended reducing unnecessary logging.

Author: stickbreaker

cores/esp32/esp32-hal-i2c.c

@@ -1480,7 +1480,9 @@ i2c_err_t i2cDetachSDA(i2c_t * i2c, int8_t sda)
  * */
 // 24Nov17 only supports Master Mode
 i2c_t * i2cInit(uint8_t i2c_num, int8_t sda, int8_t scl, uint32_t frequency) {
+#ifdef ENABLE_I2C_DEBUG_BUFFER
  log_v("num=%d sda=%d scl=%d freq=%d",i2c_num, sda, scl, frequency);
+#endif
  if(i2c_num > 1) {
  return NULL;
  }
@@ -1674,8 +1676,9 @@ i2c_err_t i2cSetFrequency(i2c_t * i2c, uint32_t clk_speed)
  clk_speed = apb/(period*2);
  log_d("APB Freq too fast, Increasing i2c Freq to %d Hz",clk_speed);
  }
+#ifdef ENABLE_I2C_DEBUG_BUFFER
  log_v("freq=%dHz",clk_speed);
- 
+#endif 
  uint32_t halfPeriod = period/2;
  uint32_t quarterPeriod = period/4;
 
@@ -1689,14 +1692,17 @@ i2c_err_t i2cSetFrequency(i2c_t * i2c, uint32_t clk_speed)
  available when a Fifo interrupt is triggered. This allows enough room in the Fifo so that
  interrupt latency does not cause a Fifo overflow/underflow event.
 */
+#ifdef ENABLE_I2C_DEBUG_BUFFER
  log_v("cpu Freq=%dMhz, i2c Freq=%dHz",getCpuFrequencyMhz(),clk_speed);
+#endif
  uint32_t fifo_delta = (INTERRUPT_CYCLE_OVERHEAD/((getCpuFrequencyMhz()*1000000 / clk_speed)*10))+1; 
  if (fifo_delta > 24) fifo_delta=24; 
  f.rx_fifo_full_thrhd = 32 - fifo_delta;
  f.tx_fifo_empty_thrhd = fifo_delta;
  i2c->dev->fifo_conf.val = f.val; // set thresholds
+#ifdef ENABLE_I2C_DEBUG_BUFFER
  log_v("Fifo delta=%d",fifo_delta);
-
+#endif
  //the clock num during SCL is low level
  i2c->dev->scl_low_period.period = period;
  //the clock num during SCL is high level