Add ifdeffery to allow operation without the clock framework
enabled. This is required on RZ/A1, as it does not have clock
driver yet.
Signed-off-by: NMarek Vasut <marek.vasut+renesas@gmail.com>
Cc: Chris Brandt <chris.brandt@renesas.com>
Cc: Jagan Teki <jagan@amarulasolutions.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>