Support for Arcom/Eurotech Viper SBC

This patch serie, against 2.6.27-rc2, adds support for the PXA-255 based 
Arcom/Eurotech Viper SBC. It is roughly based on the old 2.6.16.28 port
made by Arcom, though all bugs are of course mine.

It's been heavily tested over the last two months.

Most of these patches are quite straightforward, except for the generic
PCMCIA patch that may be questionable.

As usual, I'll be glad to receive any comment you may have about this patch.

Thanks,

	M.

 arch/arm/configs/viper_defconfig | 1657 ++++++++++++++++++++++++++++++++++++++
 arch/arm/mach-pxa/Kconfig        |    6 +
 arch/arm/mach-pxa/Makefile       |    1 +
 arch/arm/mach-pxa/viper.c        |  952 ++++++++++++++++++++++
 drivers/net/smc91x.h             |   21 +
 drivers/pcmcia/Kconfig           |    2 +-
 drivers/pcmcia/Makefile          |    1 +
 drivers/pcmcia/pxa2xx_base.c     |   20 +-
 drivers/pcmcia/pxa2xx_base.h     |    7 +
 drivers/pcmcia/pxa2xx_viper.c    |  183 +++++
 drivers/pcmcia/soc_common.h      |    2 +
 include/asm-arm/arch-pxa/irqs.h  |   23 +
 include/asm-arm/arch-pxa/viper.h |   91 +++