Disable the TWL4030_PWRIRQ_PWRBTN symbol from the system headers;
initialization of the power button handler still needs work, so
an equivalent symbol is defined in its driver.
Power IRQs now properly handle trigger specs from request_irq();
stop goofing with registers reserved to the IRQ infrastructure.
Minor cleanup: switch several messages to pr_debug().
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Tony Lindgren <tony@atomide.com>