soundwire: qcom: avoid dependency on CONFIG_SLIMBUS

The driver may be used without slimbus, so don't depend on slimbus.
Signed-off-by: Jonathan Marek <jonathan@marek.ca>
Tested-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Reviewed-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20200905173905.16541-3-jonathan@marek.caSigned-off-by: Vinod Koul <vkoul@kernel.org>

drivers/soundwire/Kconfig

@@ -33,7 +33,7 @@ config SOUNDWIRE_INTEL
 
 config SOUNDWIRE_QCOM
 	tristate "Qualcomm SoundWire Master driver"
-	depends on SLIMBUS
+	imply SLIMBUS
 	depends on SND_SOC
 	help
 	  SoundWire Qualcomm Master driver.

drivers/soundwire/qcom.c

@@ -745,7 +745,11 @@ static int qcom_swrm_probe(struct platform_device *pdev)
 	if (!ctrl)
 		return -ENOMEM;
 
+#if IS_ENABLED(CONFIG_SLIBMUS)
 	if (dev->parent->bus == &slimbus_bus) {
+#else
+	if (false) {
+#endif
 		ctrl->reg_read = qcom_swrm_ahb_reg_read;
 		ctrl->reg_write = qcom_swrm_ahb_reg_write;
 		ctrl->regmap = dev_get_regmap(dev->parent, NULL);