soundwire: remove useless initializations

No need for explicit initialization of page and ssp fields, they are
already zeroed with a memset.

Detected with cppcheck:

[drivers/soundwire/bus.c:309]: (style) Variable 'msg->page' is
reassigned a value before the old one has been used.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Vinod Koul <vkoul@kernel.org>

drivers/soundwire/bus.c

@@ -271,8 +271,6 @@ int sdw_fill_msg(struct sdw_msg *msg, struct sdw_slave *slave,
 	msg->dev_num = dev_num;
 	msg->flags = flags;
 	msg->buf = buf;
-	msg->ssp_sync = false;
-	msg->page = false;
 
 	if (addr < SDW_REG_NO_PAGE) { /* no paging area */
 		return 0;