rpmsg: glink: Allow unaligned data access

Glink protocol requires that each message is aligned on a 8 byte offset.
This is purely a restriction from glink, so in order to support clients
which do not adher to this, allow data packets of any size, but align
the head index accordingly, effectively removing the alignment
restriction.

Acked-by: Arun Kumar Neelakantam <aneela@codeaurora.org>
Signed-off-by: Sricharan R <sricharan@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

drivers/rpmsg/qcom_glink_native.c

@@ -227,9 +227,6 @@ static int qcom_glink_tx(struct qcom_glink *glink,
 	if (tlen >= glink->tx_pipe->length)
 		return -EINVAL;
 
-	if (WARN(tlen % 8, "Unaligned TX request"))
-		return -EINVAL;
-
 	ret = mutex_lock_interruptible(&glink->tx_lock);
 	if (ret)
 		return ret;
@@ -695,9 +692,6 @@ static int __qcom_glink_send(struct glink_channel *channel,
 		__le32 left_size;
 	} __packed req;
 
-	if (WARN(len % 8, "RPM GLINK expects 8 byte aligned messages\n"))
-		return -EINVAL;
-
 	req.msg.cmd = cpu_to_le16(RPM_CMD_TX_DATA);
 	req.msg.param1 = cpu_to_le16(channel->lcid);
 	req.msg.param2 = cpu_to_le32(channel->rcid);