mfd: twl-core: Add a clock subdevice for the TWL6030

Also the TWL6030 has some clocks, so add a subdevice for that.

Signed-off-by: Andreas Kemnade <andreas@kemnade.info>
Reviewed-by: Roger Quadros <rogerq@kernel.org>
Link: https://lore.kernel.org/r/20241014161109.2222-2-andreas@kemnade.info


Signed-off-by: Lee Jones <lee@kernel.org>