lights: Correct LCD minimum brightness value

Change-Id: Idd5d704cff4d88b34865356f500dc1923e6e84fe
thermanager: Correct backlight path

Change-Id: I27fbbb94e065f80f32b92c895e2408beae40db6b
thermanager: Correct backlight values

Change-Id: I907a0c90efb67c63f442acde5ad480e0eec47700