Try adding handle_irq to machine definition.

This seems to be present in the i_atnt machine definition.

Kernel now boots with CONFIG_MACH_MSM8X60_FUSN_FFA, which seems correct
as it is in both the 3.0.8 i_vzw config and the 2.6.35 config (but the
name is CONFIG_MACH_MSM8X60_CHARM_FFA in 2.6.35).
Override firmware clock settings for all models.