soundwire: compare only dev-ID part of Chip-ID for slave device

Soundwire slave device version number can change over time.
Compare only the device ID part of Chip ID read from slave
device chip.

Change-Id: Idc2d84b3e8451cf73e75c3042393e22fecf1e88d
Signed-off-by: Banajit Goswami <bgoswami@codeaurora.org>