Enable platforms to use the irq-chip and irq-flow abstractions: allow setting
of the chip, the type and provide highlevel handlers for common irq-flows.

[rostedt@goodmis.org: misroute-irq: Don't call desc->chip->end because of edge interrupts]
Signed-off-by: Thomas Gleixner
Signed-off-by: Ingo Molnar
Cc: Benjamin Herrenschmidt
Signed-off-by: Steven Rostedt
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds