eventdev: fix Doxygen processing of vector struct

[ upstream commit f5746d3fa2f9f08179878c22a0ec1f598a7f15a1 ]

The event vector struct was missing comments on two members, and also
was inadvertently creating a local variable called "__rte_aligned" in
the doxygen output.

Correct the comment markers to fix the former issue, and fix the latter
by putting "#ifdef __DOXYGEN" around the alignment constraint.

Fixes: 1cc44d4 ("eventdev: introduce event vector capability")
Fixes: 3c83806 ("eventdev: introduce event vector Rx capability")
Fixes: 699155f ("eventdev: fix clang C++ include")

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
Acked-by: Pavan Nikhilesh <pbhagavatula@marvell.com>
Acked-by: Jerin Jacob <jerinj@marvell.com>

lib/eventdev/rte_eventdev.h

@@ -1107,10 +1107,8 @@ struct rte_event_vector {
 		 * port and queue of the mbufs in the vector
 		 */
 		struct {
-			uint16_t port;
-			/* Ethernet device port id. */
-			uint16_t queue;
-			/* Ethernet device queue id. */
+			uint16_t port;   /**< Ethernet device port id. */
+			uint16_t queue;  /**< Ethernet device queue id. */
 		};
 	};
 	/**< Union to hold common attributes of the vector array. */
@@ -1139,7 +1137,11 @@ struct rte_event_vector {
 	 * vector array can be an array of mbufs or pointers or opaque u64
 	 * values.
 	 */
+#ifndef __DOXYGEN__
 } __rte_aligned(16);
+#else
+};
+#endif
 
 /* Scheduler type definitions */
 #define RTE_SCHED_TYPE_ORDERED          0