9036 zfs: duplicate 'const' declaration specifier

Reviewed by: Yuri Pankov <yuripv@yuripv.net>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Approved by: Dan McDonald <danmcd@joyent.com>

usr/src/uts/common/fs/zfs/vdev_indirect_mapping.c

@@ -133,8 +133,8 @@ vdev_indirect_mapping_size(vdev_indirect_mapping_t *vim)
 static int
 dva_mapping_overlap_compare(const void *v_key, const void *v_array_elem)
 {
-	const uint64_t const *key = v_key;
-	const vdev_indirect_mapping_entry_phys_t const *array_elem =
+	const uint64_t *key = v_key;
+	const vdev_indirect_mapping_entry_phys_t *array_elem =
 	    v_array_elem;
 	uint64_t src_offset = DVA_MAPPING_GET_SRC_OFFSET(array_elem);