config: enable packet prefetching with Meson

[ upstream commit 048a2aa ]

With Make build system, RTE_PMD_PACKET_PREFETCH was enabled
by default. It got lost when transitioning to Meson build
system.

In order to avoid performance changes, this patch enables
packet prefetching in rte_config.h.

Fixes: 9314afb ("drivers: add infrastructure for meson build")

Reported-by: Marvin Liu <yong.liu@intel.com>
Suggested-by: David Marchand <david.marchand@redhat.com>
Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>

config/rte_config.h

@@ -99,6 +99,9 @@
 
 /****** driver defines ********/
 
+/* Packet prefetching in PMDs */
+#define RTE_PMD_PACKET_PREFETCH 1
+
 /* QuickAssist device */
 /* Max. number of QuickAssist devices which can be attached */
 #define RTE_PMD_QAT_MAX_PCI_DEVICES 48