genirq: Remove __do_IRQ

genirq: Remove __do_IRQ

All architectures are finally converted. Remove the cruft.

Signed-off-by: Thomas Gleixner <[email protected]>
Cc: Richard Henderson <[email protected]>
Cc: Mike Frysinger <[email protected]>
Cc: David Howells <[email protected]>
Cc: Tony Luck <[email protected]>
Cc: Greg Ungerer <[email protected]>
Cc: Michal Simek <[email protected]>
Acked-by: David Howells <[email protected]>
Cc: Kyle McMartin <[email protected]>
Acked-by: Benjamin Herrenschmidt <[email protected]>
Cc: Chen Liqin <[email protected]>
Cc: "David S. Miller" <[email protected]>
Cc: Chris Metcalf <[email protected]>
Cc: Jeff Dike <[email protected]>