staging:iio:spear_adc: Remove unused variable
staging:iio:spear_adc: Remove unused variable

Remove the scale_mv variable from the read_raw() callback. Fixes the following
warning:
	drivers/staging/iio/adc/spear_adc.c: In function 'spear_read_raw':
	drivers/staging/iio/adc/spear_adc.c:149:6: warning: unused variable 'scale_mv'

Signed-off-by: Lars-Peter Clausen <3318dc5ce3e4fb7c28a0b841b6801c884e1d0896@metafoo.de>
Cc: Stefan Roese <44b7497c4bb5f3e8c071b12b7ece82766a88068d@denx.de>
Signed-off-by: Jonathan Cameron <09f65b71b7655725897b2fd41a09a0cefe2e1ace@kernel.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs