fh < fl --> fh <= fl in od_ec_encode_q15

When lv_map_multi is on,
od_ec_encode_q15 is able to handle the situation of fh == fl

Change-Id: I7c837dda561f1d25b0203c018763dadd0cbbc75a

aom_dsp/entenc.c

diff --git a/aom_dsp/entenc.c b/aom_dsp/entenc.c
index 8e48b9e..c7a89ac 100644
--- a/aom_dsp/entenc.c
+++ b/aom_dsp/entenc.c
@@ -156,7 +156,11 @@
   l = enc->low;
   r = enc->rng;
   OD_ASSERT(32768U <= r);
+#if CONFIG_LV_MAP_MULTI
+  OD_ASSERT(fh <= fl);
+#else
   OD_ASSERT(fh < fl);
+#endif
   OD_ASSERT(fl <= 32768U);
   const int N = nsyms - 1;
   if (fl < 32768U) {