[PATCH] Driver core: hande sysdev suspend failure

This patch adds the return value check for sysdev suspend and does
restore in failure case. Send the patch to pm-list, but seems lost, so I
resend it.

Signed-off-by: Shaohua <Li&lt;shaohua.li@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>