ASoC: Intel: Use readq to read 64 bit registers

In order to fix issue described in:
"ASoC: Intel: sst: ipc command timeout"
https://patchwork.kernel.org/patch/11482829/

use readq function, which is meant to read 64 bit values from registers.
On 32 bit platforms it falls back to two readl calls.
Reported-by: Brent Lu <brent.lu@intel.com>
Signed-off-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Tested-by: Brent Lu <brent.lu@intel.com>
Acked-by: Cezary Rojewski <cezary.rojewski@intel.com>
Link: https://lore.kernel.org/r/20200507133405.32251-2-amadeuszx.slawinski@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/intel/common/sst-dsp.c

@@ -10,7 +10,7 @@
 #include <linux/interrupt.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
-#include <linux/io.h>
+#include <linux/io-64-nonatomic-lo-hi.h>
 #include <linux/delay.h>
 
 #include "sst-dsp.h"
@@ -34,16 +34,13 @@ EXPORT_SYMBOL_GPL(sst_shim32_read);
 
 void sst_shim32_write64(void __iomem *addr, u32 offset, u64 value)
 {
-	memcpy_toio(addr + offset, &value, sizeof(value));
+	writeq(value, addr + offset);
 }
 EXPORT_SYMBOL_GPL(sst_shim32_write64);
 
 u64 sst_shim32_read64(void __iomem *addr, u32 offset)
 {
-	u64 val;
-
-	memcpy_fromio(&val, addr + offset, sizeof(val));
-	return val;
+	return readq(addr + offset);
 }
 EXPORT_SYMBOL_GPL(sst_shim32_read64);