Make the hsmmc code use genirq interfaces to make sure the
card detect IRQ triggers on both edges.  Remove the older
TWL-specific infrastructure for making that happen.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>