compressdev: add missing C++ guards

[ upstream commit ef64c2f311f66bf8fe563bf7777e5dba72fc57e6 ]

Some public header files were missing 'extern "C"' C++ guards,
and couldn't be used by C++ applications. Add the missing guards.

Fixes: ed7dd94 ("compressdev: add basic device management")

Signed-off-by: Brian Dooley <brian.dooley@intel.com>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>
Acked-by: Tyler Retzlaff <roretzla@linux.microsoft.com>

lib/librte_compressdev/rte_compressdev_internal.h

@@ -5,6 +5,10 @@
 #ifndef _RTE_COMPRESSDEV_INTERNAL_H_
 #define _RTE_COMPRESSDEV_INTERNAL_H_
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /* rte_compressdev_internal.h
  * This file holds Compressdev private data structures.
  */
@@ -111,4 +115,9 @@ struct rte_compressdev_data {
 	void *dev_private;
 	/**< PMD-specific private data */
 } __rte_cache_aligned;
+
+#ifdef __cplusplus
+}
+#endif
+
 #endif