Factor out the parts on the White Hawk BreakOut board that are also
present on the White Hawk Single board, so they can be reused when
introducing support for the latter.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/8c05b4d283b5d765fbc6f64cee9a247cded29409.1706192990.git.geert+renesas@glider.be