ASoC: qdsp6: qdafe: fix some off by one bugs

The > should be >= or we could read one element beyond the end of the
port_maps[] array.

Fixes: 7fa2d70f ("ASoC: qdsp6: q6afe: Add q6afe driver")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>