samples/rpmsg: Introduce a module parameter for message count

The current rpmsg_client_sample uses a fixed number of messages to
be sent to each instance. This is currently set at 100. Introduce
an optional module parameter 'count' so that the number of messages
to be exchanged can be made flexible.

Signed-off-by: Suman Anna <[e-mail]>
Signed-off-by: Bjorn Andersson <[e-mail]>

samples/rpmsg/rpmsg_client_sample.c

···
 #include <linux/rpmsg.h>
 
 #define MSG		"hello world!"
-#define MSG_LIMIT	100
+
+static int count = 100;
+module_param(count, int, 0644);
 
 struct instance_data {
 	int rx_count;
···
 			     true);
 
 	/* samples should not live forever */
-	if (idata->rx_count >= MSG_LIMIT) {
+	if (idata->rx_count >= count) {
 		dev_info(&rpdev->dev, "goodbye!\n");
 		return 0;
 	}