Since Amlogic SoCs supports more than 8 OPPs per domains, we need increase
the OPP structure size.

This patch increases the MAX_DVFS_OPPS to 16.
Signed-off-by: NNeil Armstrong <narmstrong@baylibre.com>
Signed-off-by: NSudeep Holla <sudeep.holla@arm.com>