Patch from George Joseph

Machine number 641 already assigned.
Changes...
arch/arm/boot/compressed/head-xscale.S
arch/arm/mach-ixp4xx/Kconfig
arch/arm/mach-ixp4xx/Makefile
include/asm-arm/arch-ixp4xx/uncompress.h
Adds...
arch/arm/mach-ixp4xx/gtwx5715-pci.c
arch/arm/mach-ixp4xx/gtwx5715-setup.c
include/asm-arm/arch-ixp4xx/gtwx5715.h
Includes changes requested by Russell King

Signed-off-by: George T Joseph
Signed-off-by: Deepak Saxena
Signed-off-by: Russell King