soundwire: update soundwire driver for 32 bit environment

Soundwire driver is not compitible for 32 bit mode,
In 32 bit mode if we read 64 bit device tree entries
the 32 bit is truncated with this conversion.
update soundwire driver to read 64 bit device tree entries
properly.

Change-Id: Iebc26f4ee5469fb3435dc3d324a976836d60e10f
Signed-off-by: Santosh Mardi <gsantosh@codeaurora.org>