soundwire: intel_auxdevice: remove redundant assignment to variable link_flags

soundwire: intel_auxdevice: remove redundant assignment to variable link_flags

The variable link_flags is being initialized with a value that is never
read, it is being re-assigned later on. The initialization is
redundant and can be removed.

Cleans up clang scan build warning:
drivers/soundwire/intel_auxdevice.c:624:2: warning: Value stored
to 'link_flags' is never read [deadcode.DeadStores]

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20240205182436.1843447-1-colin.i.king@gmail.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>