bus/dpaa: fix C++ include guard

Supplement the missing half of braces for the extern "C" block,
or remove the incomplete guard in internal header.

Fixes: 6d6b4f49a1 ("bus/dpaa: add FMAN hardware operations")
Fixes: 919eeaccb2 ("bus/dpaa: introduce NXP DPAA bus driver skeleton")

Signed-off-by: Weiguo Li <liwg06@foxmail.com>

drivers/bus/dpaa/include/fsl_fman.h

@@ -9,10 +9,6 @@
 
 #include <rte_compat.h>
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
 /* Status field in FD is updated on Rx side by FMAN with following information.
  * Refer to field description in FM BG.
  */

drivers/bus/dpaa/rte_dpaa_bus.h

@@ -17,6 +17,10 @@
 #include <fsl_bman.h>
 #include <netcfg.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /* This sequence number field is used to store event entry index for
  * driver specific usage. For parallel mode queues, invalid
  * index will be set and for atomic mode queues, valid value