clk_put() was being invoked on a clock obtained by
devm_clk_get_optional().

Link: https://lore.kernel.org/r/20200507201544.43432-2-james.quinlan@broadcom.comSigned-off-by: NJim Quinlan <jquinlan@broadcom.com>
Signed-off-by: NLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: NFlorian Fainelli <f.fainelli@gmail.com>
Acked-by: NNicolas Saenz Julienne <nsaenzjulienne@suse.de>