soundwire: intel: add missing headers for cross-compilation

readl/writel and ioread32 are used without the relevant headers, fix.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20190916185739.32184-2-pierre-louis.bossart@linux.intel.comSigned-off-by: Vinod Koul <vkoul@kernel.org>

drivers/soundwire/intel.c

@@ -10,6 +10,7 @@
 #include <linux/delay.h>
 #include <linux/module.h>
 #include <linux/interrupt.h>
+#include <linux/io.h>
 #include <linux/platform_device.h>
 #include <sound/pcm_params.h>
 #include <sound/soc.h>

drivers/soundwire/intel_init.c

@@ -9,6 +9,7 @@
 
 #include <linux/acpi.h>
 #include <linux/export.h>
+#include <linux/iomap.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/soundwire/sdw_intel.h>