powerpc: various straight conversions from module.h --> export.h

All these files were including module.h just for the basic
EXPORT_SYMBOL infrastructure.  We can shift them off to the
export.h header which is a way smaller footprint and thus
realize some compile time gains.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>

arch/powerpc/kernel/clock.c

@@ -6,7 +6,7 @@
 #include <linux/clk.h>
 #include <linux/err.h>
 #include <linux/errno.h>
-#include <linux/module.h>
+#include <linux/export.h>
 #include <asm/clk_interface.h>
 
 struct clk_interface clk_functions;