tcg-hppa: Don't try to calls to non-constant addresses.

PA-RISC uses procedure descriptors.  We'd need to emit a call to
the millicode routine $$dyncall.  However, this situation doesn't
actually arise, since we always have the descriptor available at
TCG code generation time.
Signed-off-by: NRichard Henderson <rth@twiddle.net>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

tcg/hppa/tcg-target.c

@@ -1276,8 +1276,10 @@ static inline void tcg_out_op(TCGContext *s, TCGOpcode opc, const TCGArg *args,
         if (const_args[0]) {
             tcg_out_call(s, (void *)args[0]);
         } else {
-            tcg_out32(s, INSN_BLE_SR4 | INSN_R2(args[0]));
-            tcg_out_mov(s, TCG_REG_RP, TCG_REG_R31);
+            /* ??? FIXME: the value in the register in args[0] is almost
+               certainly a procedure descriptor, not a code address.  We
+               probably need to use the millicode $$dyncall routine.  */
+            tcg_abort();
         }
         break;