The RG35XX-H adds thumbsticks, a stereo speaker, and a second USB port to
the RG35XX-Plus, and has a horizontal form factor.

Enabled in this DTS:
- Thumbsticks
- Second USB port
Signed-off-by: Ryan Walklin <ryan@testtoast.com>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Link: https://lore.kernel.org/r/20240427110225.727472-8-ryan@testtoast.comSigned-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>