net/ena: revert redefining memcpy

Redefining memcpy as rte_memcpy has no performance gain on
current compilers, and introduced bugs like this one where
rte_memcpy() will be detected as referencing past the destination.

Bugzilla ID: 1510
Fixes: 142778b ("net/ena: switch memcpy to optimized version")
Cc: stable@dpdk.org

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Acked-by: Wathsala Vithanage <wathsala.vithanage@arm.com>
Acked-by: Morten Brørup <mb@smartsharesystems.com>
Acked-by: Tyler Retzlaff <roretzla@linux.microsoft.com>
Acked-by: Shai Brandes <shaibran@amazon.com>

drivers/net/ena/base/ena_plat_dpdk.h

@@ -26,7 +26,6 @@
 #include <rte_spinlock.h>
 
 #include <sys/time.h>
-#include <rte_memcpy.h>
 
 typedef uint64_t u64;
 typedef uint32_t u32;
@@ -70,13 +69,7 @@ typedef uint64_t dma_addr_t;
 #define ENA_UDELAY(x) rte_delay_us_block(x)
 
 #define ENA_TOUCH(x) ((void)(x))
-/* Redefine memcpy with caution: rte_memcpy can be simply aliased to memcpy, so
- * make the redefinition only if it's safe (and beneficial) to do so.
- */
-#if defined(RTE_ARCH_X86) || defined(RTE_ARCH_ARM64_MEMCPY) || defined(RTE_ARCH_ARM_NEON_MEMCPY)
-#undef memcpy
-#define memcpy rte_memcpy
-#endif
+
 #define wmb rte_wmb
 #define rmb rte_rmb
 #define mb rte_mb