dcmi: fix max temperature constant

Change the max temperature constant from 128 (degrees C) to 127, because
the temperature is represented with 7 bits (the 8th bit being the sign).

Change-Id: I43d2edf8235ca69a4f31a72949079601c38355b1
Signed-off-by: Deepak Kodihalli <dkodihal@in.ibm.com>
1 file changed