Revert "leds: trigger: Remove unused function led_trigger_rename_static()"

This reverts commit f1a0ef0b which is
commit c82a1662 upstream.

It breaks the Android kernel abi and can be brought back in the future
in an abi-safe way if it is really needed.

Bug: 161946584
Change-Id: I87b9bc1d838bb6a1ce3fa4581fed17c1c734cafc
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>