Enable CODEC POST with CFG_POST_CODEC rather than with CFG_POST_DSP.

Signed-off-by: Dmitry Rakhchev <rda@emcraft.com>

post/tests.c

@@ -225,7 +225,7 @@ struct post_test post_list[] =
 	CFG_POST_DSP
     },
 #endif
-#if CONFIG_POST & CFG_POST_DSP
+#if CONFIG_POST & CFG_POST_CODEC
     {
 	"CODEC test",
 	"codec",