COAPS sample fixes

samples/net/coaps_client/src/coaps_client.c

@@ -184,7 +184,7 @@ void dtls_client(void)
 	int ret;
 	struct udp_context ctx;
 	struct dtls_timing_context timer;
-	struct zoap_packet request, zkt;
+	struct zoap_packet request, zpkt;
 	struct zoap_reply *reply;
 	struct net_pkt *pkt;
 	struct net_buf *frag;

samples/net/coaps_client/src/udp.c

@@ -82,7 +82,7 @@ int udp_tx(void *context, const unsigned char *buf, size_t size)
 	}
 }
 
-int udp_rx(void *context, unsigned char *buf, size_t size, u32_t timeout)
+int udp_rx(void *context, unsigned char *buf, size_t size)
 {
 	struct udp_context *ctx = context;
 	struct net_buf *rx_buf = NULL;
@@ -92,10 +92,7 @@ int udp_rx(void *context, unsigned char *buf, size_t size, u32_t timeout)
 	int len;
 	int rc;
 
-	rc = k_sem_take(&ctx->rx_sem, timeout == 0 ? K_FOREVER : timeout);
-	if (rc != 0) {
-		return MBEDTLS_ERR_SSL_TIMEOUT;
-	}
+	k_sem_take(&ctx->rx_sem, K_FOREVER);
 
 	read_bytes = net_pkt_appdatalen(ctx->rx_pkt);
 	if (read_bytes > size) {

samples/net/coaps_client/src/udp.h

@@ -18,6 +18,6 @@ struct udp_context {
 
 int udp_init(struct udp_context *ctx);
 int udp_tx(void *ctx, const unsigned char *buf, size_t size);
-int udp_rx(void *ctx, unsigned char *buf, size_t size, u32_t timeout);
+int udp_rx(void *ctx, unsigned char *buf, size_t size);
 
 #endif

samples/net/coaps_client/testcase.ini

@@ -1,4 +1,4 @@
 [test]
 tags = net
 build_only = true
-arch_whitelist = qemu_x86 arduino_101
+platform_whitelist = qemu_x86