ASoC: ti: delete some dead code in omap_abe_probe()

This code checks "priv->mclk_freq" twice and the second check is not
required.  The code is left over from when removed support for legacy
boot.

Fixes: 8fe120b5 ("ASoC: omap-abe-twl6040: Remove support for pdata (legacy boot)")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@gmail.com>
Link: https://lore.kernel.org/r/YNxTHXz58dhgbFtG@mwanda


Signed-off-by: Mark Brown <broonie@kernel.org>