exynos: gralloc: replace struct ion_handle with ion_user_handle_t

Replace struct ion_handle with ion_user_handle_t to match new kernel headers

Change-Id: Iefff2036f01dccbd47f0f0e6eef09e804e1e2ea0
diff --git a/include/gralloc_priv.h b/include/gralloc_priv.h
index bf2940e..bce84e4 100644
--- a/include/gralloc_priv.h
+++ b/include/gralloc_priv.h
@@ -33,6 +33,7 @@
 
 struct private_module_t;
 struct private_handle_t;
+typedef int ion_user_handle_t;
 
 struct private_module_t {
     gralloc_module_t base;
@@ -96,9 +97,9 @@
     void    *base;
     void    *base1;
     void    *base2;
-    struct ion_handle *handle;
-    struct ion_handle *handle1;
-    struct ion_handle *handle2;
+    ion_user_handle_t handle;
+    ion_user_handle_t handle1;
+    ion_user_handle_t handle2;
 
 #ifdef __cplusplus
     static const int sNumFds = 3;