regulator: palmas: Remove wrong comment for the equation calculating num_voltages

Current equation on the comment is wrong.
For linear mapping starting from 0, the equation is (maxV-minV)/stepV + 1.
Since the linear mapping for PALMAS is not all starting from 0, the equation
on the comment is not useful and misleading. Thus remove it.
Signed-off-by: NAxel Lin <axel.lin@ingics.com>
Signed-off-by: NMark Brown <broonie@linaro.org>

drivers/regulator/palmas-regulator.c

@@ -201,12 +201,6 @@ static unsigned int palmas_smps_ramp_delay[4] = {0, 10000, 5000, 2500};
 #define SMPS_CTRL_MODE_ECO		0x02
 #define SMPS_CTRL_MODE_PWM		0x03
 
-/* These values are derived from the data sheet. And are the number of steps
- * where there is a voltage change, the ranges at beginning and end of register
- * max/min values where there are no change are ommitted.
- *
- * So they are basically (maxV-minV)/stepV
- */
 #define PALMAS_SMPS_NUM_VOLTAGES	122
 #define PALMAS_SMPS10_NUM_VOLTAGES	2
 #define PALMAS_LDO_NUM_VOLTAGES		50