leds: as3645a: Replace strlcpy with strscpy

Part of a tree-wide effort to remove deprecated strlcpy()[1] and replace
it with strscpy()[2]. No return values were used, so direct replacement
is safe.

[1] https://www.kernel.org/doc/html/latest/process/deprecated.html#strlcpy
[2] https://github.com/KSPP/linux/issues/89



Signed-off-by: Azeem Shaikh <azeemshaikh38@gmail.com>
Link: https://lore.kernel.org/r/20230524144824.2360607-1-azeemshaikh38@gmail.com


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