BugLink: http://bugs.launchpad.net/bugs/1520457

intel_punit_ipc_command() maybe called when in or out
data pointers are NULL.
Signed-off-by: Qipeng Zha <qipeng.zha@intel.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
(cherry picked from commit 3fae7574)
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>