Pull backlight updates from Lee Jones:

   - handle 32bit overflow in pwm_bl

   - remove redundant code/checks in tps65217_bl and ili922x

* tag 'backlight-next-4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight:
  backlight: ili922x: Remove redundant variable len
  backlight: tps65217_bl: Remove unnecessary default brightness check
  backlight: pwm_bl: Fix overflow condition