ASoC: wcd9335: remove redundant tests

ASoC: wcd9335: remove redundant tests

cppcheck warning:

sound/soc/codecs/wcd9335.c:1810:23: style: Condition 'tx_port>=4' is
always true [knownConditionTrueFalse]
  } else if ((tx_port >= 4) && (tx_port < 8)) {
                      ^

sound/soc/codecs/wcd9335.c:1806:15: note: Assuming that condition
'tx_port<4' is not redundant
  if (tx_port < 4) {
              ^
sound/soc/codecs/wcd9335.c:1810:23: note: Condition 'tx_port>=4' is
always true
  } else if ((tx_port >= 4) && (tx_port < 8)) {
                      ^

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Link: https://lore.kernel.org/r/20220520211719.607543-5-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>