Patch from Andrew Victor

This final patch includes some general fixes.

1. Link in pm.o if CONFIG_PM is enabled.  [Should have been included in
patch 3605/1].
2. Use __raw_readl()/__raw_writel() when accessing System Peripheral
registers.
3. Removed some unnecessary includes
Signed-off-by: NAndrew Victor <andrew@sanpeople.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>