configure: Add CONFIG_QEMU_LDST_OPTIMIZATION for TCG qemu_ld/st optimization

Enable CONFIG_QEMU_LDST_OPTIMIZATION for TCG qemu_ld/st optimization only when
a host is i386 or x86_64.
Signed-off-by: NYeongkyoon Lee <yeongkyoon.lee@samsung.com>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

configure

@@ -3881,6 +3881,12 @@ upper() {
     echo "$@"| LC_ALL=C tr '[a-z]' '[A-Z]'
 }
 
+case "$cpu" in
+  i386|x86_64)
+    echo "CONFIG_QEMU_LDST_OPTIMIZATION=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