uboot-imx

Fix the confilcts when merging 'master' into hpc2.
The conflicts due to a new mpc7448 p3m7448 board is in the main tree.

Merge branch 'master' into hpc2

Conflicts:

	MAKEALL
	cpu/74xx_7xx/cpu.c
	cpu/74xx_7xx/cpu_init.c
	cpu/74xx_7xx/speed.c