spi: controller driver for Designware SPI core and PCI interface

Hi David and all,

This patch series add driver for Designware SPI core + PCI interface, and they are generated against kernel 2.6.31-rc5

0001: driver for the DW SPI core
0002: driver for PCI interface
0003: add DMA support

This driver has been tested on Intel Moorestown platform, with Maxim's Max3110 UART device and Option's 3G modem GTM501L, both PIO and DMA works fine, and these 2 slave devcies can work simultaneously.

User can use "dw_apb_ssi_db.pdf" from Synopsys as HW datasheet

please help to review them.

Thanks,
Feng

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