configure: ppc: Disable ldbrx instruction by default

Only enable it for CPUs that support it.
This restores the behavior prior to 7a650caf.

1 files changed, 2 insertions, 0 deletions

diff --git a/configure b/configure
index b687790af0..fced12f9bd 100755
--- a/configure
+++ b/configure
@@ -3135,6 +3135,8 @@ elif enabled mips; then
 
 elif enabled ppc; then
 
+    disable ldbrx
+
     case $(tolower $cpu) in
         601|ppc601|powerpc601)
             cpuflags="-mcpu=601"