enable NPTL for ppc-linux-user targets in configure

Enabling support for ppc64-linux-user should be easy enough to do later.

Signed-off-by: Nathan Froyd <froydnj@codesourcery.com>
Signed-off-by: malc <av1474@comtv.ru>
diff --git a/configure b/configure
index 36db3b2..def8948 100755
--- a/configure
+++ b/configure
@@ -1921,12 +1921,14 @@
   ppc)
     gdb_xml_files="power-core.xml power-fpu.xml power-altivec.xml power-spe.xml"
     target_phys_bits=32
+    target_nptl="yes"
   ;;
   ppcemb)
     TARGET_BASE_ARCH=ppc
     TARGET_ABI_DIR=ppc
     gdb_xml_files="power-core.xml power-fpu.xml power-altivec.xml power-spe.xml"
     target_phys_bits=64
+    target_nptl="yes"
   ;;
   ppc64)
     TARGET_BASE_ARCH=ppc