bsp: Add isp_mali-c55 driver

Arm Mali-C55 image signal processor (ISP) driver

The Corstone-315 has an ISP IP, which can be
used to create downscaled image for ML vision
applications.
ISP also can handle camera lens, sensors. The
driver comes with a 3A algorithm (proprietary)

Signed-off-by: Gabor Abonyi <gabor.abonyi@arm.com>