iommu/fsl: Add void declarations in zero-arg functions.

Added explicit void declarations to zero-argument function headers.
The following coccinelle script was used:
@addvoid@
identifier f;
@@

f(
+ void
 ) { ... }

Signed-off-by: Chi Pham <fempsci@gmail.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
diff --git a/drivers/iommu/fsl_pamu.c b/drivers/iommu/fsl_pamu.c
index b99dd88..5c9b424 100644
--- a/drivers/iommu/fsl_pamu.c
+++ b/drivers/iommu/fsl_pamu.c
@@ -92,7 +92,7 @@
  * subwindow count per liodn.
  *
  */
-u32 pamu_get_max_subwin_cnt()
+u32 pamu_get_max_subwin_cnt(void)
 {
 	return max_subwindow_count;
 }