Add support for Texas Instruments LP5569 LED driver.

Texas Instruments LP5569 is 9 channels chip with programmable engines.

It almost a copy of LP5523 with fundamental changes to regs order and
regs content.

Has difference in how the clock is handled and doesn't support detecting
clock time automatically, different handling for selftest and different
scheme for the status regs.

LED chip supports ENGINE and MUX to group LED and run precompiled code
with magic values to run patterns. This is loaded via the sysfs entry
and it's passed as a string of ASCII HEX char.

One some devices using this LED Controller (a NBG7815 Router) it was
found loading big precompiled pattern with up to 96 bytes of code. To
have support for this "extended" scenario, hardcode each engine to
support 4 pages of precompiled pattern (128 bytes of code) and 1 page
for each MUX. This gives plenty of space for any kind precompiled
pattern keeping simple logic for page handling of each engine and mux.
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Link: https://lore.kernel.org/r/20240626160027.19703-21-ansuelsmth@gmail.comSigned-off-by: Lee Jones <lee@kernel.org>