remove 2nd DVCcodec time regression

[Richard Henderson]

I tried out your patch.  It causes these additional failures on i686.

FAIL: gcc.c-torture/execute/loop-2c.c execution,  -Os 
FAIL: gcc.c-torture/execute/loop-2d.c execution,  -Os 
FAIL: gcc.c-torture/execute/loop-2e.c execution,  -Os 
FAIL: gcc.c-torture/execute/loop-3c.c execution,  -Os 


r~