Replace mdelay() by msleep() in bus_suspend(); the rest of the system will
gain 7ms. The related code is reorganized to minimize the number of
locking/unlocking calls.

The last hunk of the patch is the formatting change by Lindent.
Signed-off-by: Olav Kongas <ok@artecdesign.ee>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>