iio: frequency: admv1013: remove the always true condition

unsigned int variable is always greater than or equal to zero. Make the
if condition simple.

Signed-off-by: Muhammad Usama Anjum <[e-mail]>
Fixes: da35a7b526d9 ("iio: frequency: admv1013: add support for ADMV1013")
Link: https://lore.kernel.org/r/YdS3gJYtECMaDDjA@debian-BULLSEYE-live-builder-AMD64
Signed-off-by: Jonathan Cameron <[e-mail]>

drivers/iio/frequency/admv1013.c

···
 
 	vcm = regulator_get_voltage(st->reg);
 
-	if (vcm >= 0 && vcm < 1800000)
+	if (vcm < 1800000)
 		mixer_vgate = (2389 * vcm / 1000000 + 8100) / 100;
 	else if (vcm > 1800000 && vcm < 2600000)
 		mixer_vgate = (2375 * vcm / 1000000 + 125) / 100;