Input: dlink-dir685-touchkeys - make array bl_data static const

Input: dlink-dir685-touchkeys - make array bl_data static const

Don't populate the read-only array bl_data on the stack but instead
make it static const. Also makes the object code a little smaller.

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
Link: https://lore.kernel.org/r/20221005154852.320056-1-colin.i.king@gmail.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>