Fix two tests for ELFV2 powerpc64 ABI

tests/webtbs/tw7851a.pp

@@ -39,7 +39,11 @@ asm
 {$else}
   std r0, retaddr
 {$ifdef linux}
+  {$ifdef FPC_ABI_ELFV2}
+  bl TMyObject.Test2
+  {$else}
   bl .TMyObject.Test2
+  {$endif}
 {$else linux}
   bl TMyObject.Test2
 {$endif linux}

tests/webtbs/tw8153a.pp

@@ -18,7 +18,9 @@ asm
   ld r4,0(r3)
   ld r4,+vmtoffset tc.v(r4)
 {$if defined(linux) or defined(aix)}
-  ld r4,0(r4)
+  {$ifndef FPC_ABI_ELFV2}
+    ld r4,0(r4)
+  {$endif}
 {$endif linux or aix}
 {$else}
   lwz r4,0(r3)