MAINTAINERS: Adjust the file entry in SIEMENS IPC LED DRIVERS

MAINTAINERS: Adjust the file entry in SIEMENS IPC LED DRIVERS

Commit 835a0c10d33b ("leds: Rename simple directory to simatic") renames
the driver's directory to drivers/leds/simatic, but misses to adjust the
SIEMENS IPC LED DRIVERS section in MAINTAINERS.

Hence, ./scripts/get_maintainer.pl --self-test=patterns complains about a
broken reference. Adjust the file entry to this renaming.

Signed-off-by: Lukas Bulwahn <lukas.bulwahn@redhat.com>
Link: https://lore.kernel.org/r/20250325092159.213463-1-lukas.bulwahn@redhat.com
Signed-off-by: Lee Jones <lee@kernel.org>