staging: pi433: fix CamelCase for powerLevel

Fixes checkpatch warnings:

  CHECK: Avoid CamelCase: <powerLevel>
Signed-off-by: Valentin Vidic <Valentin.Vidic@CARNet.hr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/pi433/rf69.c

@@ -330,19 +330,19 @@ int rf69_disable_amplifier(struct spi_device *spi, u8 amplifier_mask)
 	return rf69_clear_bit(spi, REG_PALEVEL, amplifier_mask);
 }
 
-int rf69_set_output_power_level(struct spi_device *spi, u8 powerLevel)
+int rf69_set_output_power_level(struct spi_device *spi, u8 power_level)
 {
 	// TODO: Dependency to PA0,1,2 setting
-	powerLevel += 18;
+	power_level += 18;
 
 	// check input value
-	if (powerLevel > 0x1f) {
+	if (power_level > 0x1f) {
 		dev_dbg(&spi->dev, "set: illegal input param");
 		return -EINVAL;
 	}
 
 	// write value
-	return rf69_read_mod_write(spi, REG_PALEVEL, MASK_PALEVEL_OUTPUT_POWER, powerLevel);
+	return rf69_read_mod_write(spi, REG_PALEVEL, MASK_PALEVEL_OUTPUT_POWER, power_level);
 }
 
 int rf69_set_pa_ramp(struct spi_device *spi, enum paRamp paRamp)

drivers/staging/pi433/rf69.h

@@ -34,7 +34,7 @@ int rf69_set_deviation(struct spi_device *spi, u32 deviation);
 int rf69_set_frequency(struct spi_device *spi, u32 frequency);
 int rf69_enable_amplifier(struct spi_device *spi, u8 amplifier_mask);
 int rf69_disable_amplifier(struct spi_device *spi, u8 amplifier_mask);
-int rf69_set_output_power_level(struct spi_device *spi, u8 powerLevel);
+int rf69_set_output_power_level(struct spi_device *spi, u8 power_level);
 int rf69_set_pa_ramp(struct spi_device *spi, enum paRamp paRamp);
 int rf69_set_antenna_impedance(struct spi_device *spi, enum antennaImpedance antennaImpedance);
 int rf69_set_lna_gain(struct spi_device *spi, enum lnaGain lnaGain);