twl4030 "subdriver" irq tweaks

Bugfixes to TWL subdriver irq handler setup ... lockdep
workarounds, remove IRQF_DISABLED.  NOPs with current code.

These changes are specific to the drivers which register
directly with the PIH irq_chip (in twl4030-core), and are
prerequsites to a cleanup patch for that PIH infrastructure.
(Unless you don't use these drivers.)

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Tony Lindgren <tony@atomide.com>