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>
diff --git a/arch/powerpc/mm/slice.c b/arch/powerpc/mm/slice.c
index ba51948..73709f7 100644
--- a/arch/powerpc/mm/slice.c
+++ b/arch/powerpc/mm/slice.c
@@ -29,7 +29,7 @@
 #include <linux/pagemap.h>
 #include <linux/err.h>
 #include <linux/spinlock.h>
-#include <linux/module.h>
+#include <linux/export.h>
 #include <asm/mman.h>
 #include <asm/mmu.h>
 #include <asm/spu.h>