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.com


Signed-off-by: Mark Brown <broonie@kernel.org>