vp9_cx_iface.c: allow speed greater than 7

This makes it possible to use --rt --cpu-used=8.

Change-Id: I8b5bc4449b6e05d24d25145e35b4793501268c59

vp9/vp9_cx_iface.c

diff --git a/vp9/vp9_cx_iface.c b/vp9/vp9_cx_iface.c
index b150161..24dcbfa 100644
--- a/vp9/vp9_cx_iface.c
+++ b/vp9/vp9_cx_iface.c
@@ -353,7 +353,7 @@
 
   oxcf->key_freq               = cfg->kf_max_dist;
 
-  oxcf->speed                  =  clamp(abs(extra_cfg->cpu_used), 0, 7);
+  oxcf->speed                  =  abs(extra_cfg->cpu_used);
   oxcf->encode_breakout        =  extra_cfg->static_thresh;
   oxcf->play_alternate         =  extra_cfg->enable_auto_alt_ref;
   oxcf->noise_sensitivity      =  extra_cfg->noise_sensitivity;