Align the quantizers for inter/inter modes in the first pass coding

Use regular extended zero bin quantizer for both inter and intra
modes in the first pass. This doesn't affect lowres and midres
significantly, but would bring back 0.9% coding gains for hdres.

Change-Id: Ifa5977fa7b141fc5be595c0f3a4fc81a93f6606f
diff --git a/vp10/encoder/encodemb.c b/vp10/encoder/encodemb.c
index 34428a7..aceb10f 100644
--- a/vp10/encoder/encodemb.c
+++ b/vp10/encoder/encodemb.c
@@ -1111,7 +1111,7 @@
                           tx_size, ctx);
 #else
   vp10_xform_quant(x, plane, block, blk_row, blk_col, plane_bsize,
-                   tx_size, VP10_XFORM_QUANT_FP);
+                   tx_size, VP10_XFORM_QUANT_B);
 #endif  // CONFIG_NEW_QUANT
 
   if (p->eobs[block] > 0) {