[PATCH] x86: adjust AVX-VNNI-INT{8,16} prereqs

[Jan Beulich]

These are more logical to take AVX-VNNI as prereq, retaining AVX2 as an
indirect prereq.
---
In turn the question arises whether AVX10.2 should consider both to be
prereqs as well. The situation here isn't the same as it was with
AVX512-VNNI vs AVX-VNNI, after all.

--- a/opcodes/i386-gen.c
+++ b/opcodes/i386-gen.c
@@ -163,9 +163,9 @@ static const dependency isa_dependencies
   { "AVX_IFMA",
     "AVX2" },
   { "AVX_VNNI_INT8",
-    "AVX2" },
+    "AVX_VNNI" },
   { "AVX_VNNI_INT16",
-    "AVX2" },
+    "AVX_VNNI" },
   { "AVX_NE_CONVERT",
     "AVX2" },
   { "CX16",