Replace CTLFLAG_NEEDGIANT with CTLFLAG_MPSAFE for all light sensor
sysctls. The driver uses iicbus_transfer for I2C access which
handles locking internally via the I2C bus layer.
Sysctls converted:
- dev.isl.X.als (ambient light sensor)
- dev.isl.X.ir (infrared sensor)
- dev.isl.X.prox (proximity sensor)
- dev.isl.X.resolution (sensor resolution)
- dev.isl.X.range (sensor range)