Fix MAP_BASE for 64bit ip22.

#define CAC_BASE		0xffffffff80000000

#define IO_BASE			0xffffffffa0000000

#define UNCAC_BASE		0xffffffffa0000000

#define MAP_BASE		0xffffffffc0000000

#define MAP_BASE		0xc000000000000000

#define TO_PHYS(x)		(             ((x) & TO_PHYS_MASK))

#define TO_CAC(x)		(CAC_BASE   | ((x) & TO_PHYS_MASK))