[ARM] 3206/1: Modifications to the bus arbiter controller for the Intel PXA27x

Patch from Jared Hulbert

The following patch changes the bus arbiter controller settings
for the Intel PXA27x Application Processor Family.  Up to 5%
better video performance.  It parks the bus on the core while not
in use and sets the arbitration for other bus items.  The patch
only applies changes to the Intel Mainstone development platform.

This patch is not compatible with preproduction Intel PXA27x
silicon.

This patch is based on the Intel Linux Preview Kit released to the
public on 25 Feb. 2005 found at
ftp://ftp.arm.linux.org.uk/pub/linux/arm/people/xscale/mainstone/02-25-2005/.

Signed-off-by: Justin A Treon <[email protected]>
Signed-off-by: Jared Hulbert <[email protected]>
Signed-off-by: Nicolas Pitre <[email protected]>
Signed-off-by: Russell King <[email protected]>

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