Sparc: avoid AREG0 wrappers for memory access helpers

Adjust generation of load and store templates so that the functions
take a parameter for CPUState instead of relying on global env.

Remove wrappers. Move remaining memory helpers to ldst_helper.c.

Signed-off-by: Blue Swirl <blauwirbel@gmail.com>

configure

diff --git a/configure b/configure
index afe7395..8b4e3c1 100755
--- a/configure
+++ b/configure
@@ -3606,6 +3606,13 @@
     exit 1
   ;;
 esac
+
+case "$target_arch2" in
+  sparc*)
+    echo "CONFIG_TCG_PASS_AREG0=y" >> $config_target_mak
+  ;;
+esac
+
 echo "TARGET_SHORT_ALIGNMENT=$target_short_alignment" >> $config_target_mak
 echo "TARGET_INT_ALIGNMENT=$target_int_alignment" >> $config_target_mak
 echo "TARGET_LONG_ALIGNMENT=$target_long_alignment" >> $config_target_mak