[n900-v5 0/5] n900 and isigen modem driver

Hi all, I did more restructuring on the patches. The new isigen plugin is modeled after atgen. The "isimodem" modem driver is removed. The n900 modem driver seems to run on Nokia N900 with meego kernel and userspace. All the naughty bits that Rémi complained about are now moved into uspnmodem (and modemconf). If the modem has (non-zero) integer property "Address", the isigen or n900 modem driver will configure the interface with the given address. If there is no "Address", then the modem drivers assume that configation is done for them. --Pekka