staging: pi433: fix CamelCase for dagc enum

Fixes checkpatch warnings:

  CHECK: Avoid CamelCase: <normalMode>
  CHECK: Avoid CamelCase: <improve4LowModulationIndex>
Signed-off-by: Valentin Vidic <Valentin.Vidic@CARNet.hr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/pi433/Documentation/pi433.txt

@@ -215,9 +215,9 @@ rf params:
 		Allowd values: 0...7
 	dagc;
 		operation mode of the digital automatic gain control
-		normalMode
+		normal_mode
 		improve
-		improve4LowModulationIndex
+		improve_for_low_modulation_index
 
  packet format:
 	enable_sync

drivers/staging/pi433/rf69.c

@@ -751,11 +751,11 @@ int rf69_set_fifo_threshold(struct spi_device *spi, u8 threshold)
 int rf69_set_dagc(struct spi_device *spi, enum dagc dagc)
 {
 	switch (dagc) {
-	case normalMode:
+	case normal_mode:
 		return rf69_write_reg(spi, REG_TESTDAGC, DAGC_NORMAL);
 	case improve:
 		return rf69_write_reg(spi, REG_TESTDAGC, DAGC_IMPROVED_LOWBETA0);
-	case improve4LowModulationIndex:
+	case improve_for_low_modulation_index:
 		return rf69_write_reg(spi, REG_TESTDAGC, DAGC_IMPROVED_LOWBETA1);
 	default:
 		dev_dbg(&spi->dev, "set: illegal input param");

drivers/staging/pi433/rf69_enum.h

@@ -135,9 +135,9 @@ enum address_filtering {
 };
 
 enum dagc {
-	normalMode,
+	normal_mode,
 	improve,
-	improve4LowModulationIndex
+	improve_for_low_modulation_index
 };
 
 #endif