ASoC: remove unneeded dai->driver check

On soc_add_dai(), it is checking dai->driver->xxx,
This means, dai->driver is mandatory, never been NULL.
dai->driver check is not needed.
This patch removes it.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/soc-core.c

@@ -2631,7 +2631,7 @@ EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
 	unsigned int freq, int dir)
 {
-	if (dai->driver && dai->driver->ops->set_sysclk)
+	if (dai->driver->ops->set_sysclk)
 		return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
 
 	return snd_soc_component_set_sysclk(dai->component, clk_id, 0,
@@ -2699,7 +2699,7 @@ EXPORT_SYMBOL_GPL(snd_soc_component_set_sysclk);
 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
 	int div_id, int div)
 {
-	if (dai->driver && dai->driver->ops->set_clkdiv)
+	if (dai->driver->ops->set_clkdiv)
 		return dai->driver->ops->set_clkdiv(dai, div_id, div);
 	else
 		return -EINVAL;
@@ -2719,7 +2719,7 @@ EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
 	unsigned int freq_in, unsigned int freq_out)
 {
-	if (dai->driver && dai->driver->ops->set_pll)
+	if (dai->driver->ops->set_pll)
 		return dai->driver->ops->set_pll(dai, pll_id, source,
 					 freq_in, freq_out);
 
@@ -2785,7 +2785,7 @@ EXPORT_SYMBOL_GPL(snd_soc_component_set_pll);
  */
 int snd_soc_dai_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio)
 {
-	if (dai->driver && dai->driver->ops->set_bclk_ratio)
+	if (dai->driver->ops->set_bclk_ratio)
 		return dai->driver->ops->set_bclk_ratio(dai, ratio);
 	else
 		return -EINVAL;
@@ -2859,7 +2859,7 @@ static int snd_soc_xlate_tdm_slot_mask(unsigned int slots,
 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
 	unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
 {
-	if (dai->driver && dai->driver->ops->xlate_tdm_slot_mask)
+	if (dai->driver->ops->xlate_tdm_slot_mask)
 		dai->driver->ops->xlate_tdm_slot_mask(slots,
 						&tx_mask, &rx_mask);
 	else
@@ -2868,7 +2868,7 @@ int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
 	dai->tx_mask = tx_mask;
 	dai->rx_mask = rx_mask;
 
-	if (dai->driver && dai->driver->ops->set_tdm_slot)
+	if (dai->driver->ops->set_tdm_slot)
 		return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
 				slots, slot_width);
 	else
@@ -2892,7 +2892,7 @@ int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
 	unsigned int tx_num, unsigned int *tx_slot,
 	unsigned int rx_num, unsigned int *rx_slot)
 {
-	if (dai->driver && dai->driver->ops->set_channel_map)
+	if (dai->driver->ops->set_channel_map)
 		return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
 			rx_num, rx_slot);
 	else
@@ -2909,7 +2909,7 @@ EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
  */
 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
 {
-	if (dai->driver && dai->driver->ops->set_tristate)
+	if (dai->driver->ops->set_tristate)
 		return dai->driver->ops->set_tristate(dai, tristate);
 	else
 		return -EINVAL;