A first cut at OMAP730 system suspend/resume.  I've only tried keypad
wakeup, which fails to wake up.  /proc/interrupts shows no interrupts
from that device, so some P2 keypad fix is needed.  But this might be a
start.  Could work harder to avoid duplicated/ifdefed code for OMAP16xx
vs. OMAP730.

--- snip ---
OMAP730 PM system suspend/resume core.

Based on code by Dave Peverley, Dirk Behme, a.o.
Signed-off-by: Todd Poynor <tpoynor@mvista.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>