Revert "Update ion header"

This reverts commit eb75db7d83a6c46578517c90f1165c61bb1fa41b.
diff --git a/libc/kernel/common/linux/ion.h b/libc/kernel/common/linux/ion.h
index aba44b3..0f872ec 100644
--- a/libc/kernel/common/linux/ion.h
+++ b/libc/kernel/common/linux/ion.h
@@ -27,7 +27,7 @@
  ION_HEAP_TYPE_CARVEOUT,
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  ION_HEAP_TYPE_CUSTOM,
- ION_NUM_HEAPS = 16,
+ ION_NUM_HEAPS,
 };
 #define ION_HEAP_SYSTEM_MASK (1 << ION_HEAP_TYPE_SYSTEM)
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
@@ -63,9 +63,8 @@
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define ION_IOC_MAP _IOWR(ION_IOC_MAGIC, 2, struct ion_fd_data)
 #define ION_IOC_SHARE _IOWR(ION_IOC_MAGIC, 4, struct ion_fd_data)
-#define ION_IOC_IMPORT _IOWR(ION_IOC_MAGIC, 5, struct ion_fd_data)
-#define ION_IOC_SYNC _IOWR(ION_IOC_MAGIC, 7, struct ion_fd_data)
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define ION_IOC_IMPORT _IOWR(ION_IOC_MAGIC, 5, int)
 #define ION_IOC_CUSTOM _IOWR(ION_IOC_MAGIC, 6, struct ion_custom_data)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif