Fix big endian ARM NEON path

It is not using the NEON acceleration but the bit grouping was applied

Author: danlark1

lib/compress/zstd_lazy.c

@@ -965,6 +965,10 @@ ZSTD_row_matchMaskGroupWidth(const U32 rowEntries)
     assert(rowEntries <= ZSTD_ROW_HASH_MAX_ENTRIES);
     (void)rowEntries;
 #if defined(ZSTD_ARCH_ARM_NEON)
+    /* NEON path only works for little endian */
+    if (!MEM_isLittleEndian()) {
+        return 1;
+    }
     if (rowEntries == 16) {
         return 4;
     }