drivers/base: change module.h -> export.h in power/common.c

This file isn't using full modular functionality, and hence
can be "downgraded" to just using export.h

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>

drivers/base/power/common.c

@@ -8,7 +8,7 @@
 
 #include <linux/init.h>
 #include <linux/kernel.h>
-#include <linux/module.h>
+#include <linux/export.h>
 #include <linux/slab.h>
 #include <linux/pm_clock.h>