[coreboot] [PATCH] i82801xx assign PIRQs in mainboard Config.lb or use default

[Joseph Smith]

This patch lets you assign PIRQs in mainboard Config.lb or use the default
ones listed in i82801xx_lpc.c.
Once and if everyone converts to the better way of assign PIRQs in
mainboard Config.lb the option of using the defaults can be removed. The
patch enables a margin of time to do so.