[ARM] 3171/1: To add missing QMGR region size for IXP4XX

Patch from Kenneth Tan

To add queue manager region size which is missing from ixp4xx-regs.h

Signed-off-by: Kenneth Tan <chong.yin.tan@intel.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>