- New Drivers

   - Add support for Richtek RT4831 Backlight

 - New Device Support
   - Add support for Qualcomm PMI8994 WLED Backlight

 - Fix-ups
   - Device Tree adaptions; richtek,rt4831-backlight
   - Trivial; spelling, whitespace, etc; Kconfig
   - Use Atomic PWM API; lm3630a_bl

 - Bug Fixes
   - Fix Firmware Node Leak in error path; lm3630a_bl
   - Fix erroneous return codes; lm3630a_bl
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