ARM: realview: switch Realview to use consolidated CLCD

This switches Realview platforms to use the consolidated CLCD panel
support, including the display capabilities.  As Realview uses a PL111,
it can support the full range of pixel formats - 444, 5551, 565 in both
RGB and BGR mode.

Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>