ASoC: wcd934x: Remove some unnecessary NULL checks

Clang warns:

../sound/soc/codecs/wcd934x.c:1886:11: warning: address of array
'wcd->rx_chs' will always evaluate to 'true' [-Wpointer-bool-conversion]
        if (wcd->rx_chs) {
        ~~  ~~~~~^~~~~~
../sound/soc/codecs/wcd934x.c:1894:11: warning: address of array
'wcd->tx_chs' will always evaluate to 'true' [-Wpointer-bool-conversion]
        if (wcd->tx_chs) {
        ~~  ~~~~~^~~~~~
2 warnings generated.

Arrays that are in the middle of a struct are never NULL so they don't
need a check like this.

Fixes: a61f3b4f ("ASoC: wcd934x: add support to wcd9340/wcd9341 codec")
Link: https://github.com/ClangBuiltLinux/linux/issues/854Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Link: https://lore.kernel.org/r/20200204060143.23393-1-natechancellor@gmail.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/wcd934x.c

@@ -1883,21 +1883,17 @@ static int wcd934x_set_channel_map(struct snd_soc_dai *dai,
 		return -EINVAL;
 	}
 
-	if (wcd->rx_chs) {
 	wcd->num_rx_port = rx_num;
 	for (i = 0; i < rx_num; i++) {
 		wcd->rx_chs[i].ch_num = rx_slot[i];
 		INIT_LIST_HEAD(&wcd->rx_chs[i].list);
 	}
-	}
 
-	if (wcd->tx_chs) {
 	wcd->num_tx_port = tx_num;
 	for (i = 0; i < tx_num; i++) {
 		wcd->tx_chs[i].ch_num = tx_slot[i];
 		INIT_LIST_HEAD(&wcd->tx_chs[i].list);
 	}
-	}
 
 	return 0;
 }