rtc: Remove TARGET_I386 from qemu-config.c, enables driftfix

qemu-config.c doesn't contain any target-specific code, and the
TARGET_I386 conditional code didn't get compiled as a result. Removing
this enables the driftfix parameter for rtc.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

qemu-config.c

@@ -247,11 +247,9 @@ QemuOptsList qemu_rtc_opts = {
         },{
             .name = "clock",
             .type = QEMU_OPT_STRING,
-#ifdef TARGET_I386
         },{
             .name = "driftfix",
             .type = QEMU_OPT_STRING,
-#endif
         },
         { /* end if list */ }
     },