media: dt-bindings: mt9p031: Add missing required properties

Add missing required clocks and supply regulator properties for the
sensor input clock and vdd, vdd_io and vaa supply regulators.

Signed-off-by: Stefan Riedmueller <s.riedmueller@phytec.de>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>