net: Declare fiber stacks as __noinit

No need to waste CPU cycles initializing the stack variables.

Change-Id: I0c517125ef37f7d0de4fd0040c4b4700536cd7c7
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
diff --git a/net/ip/net_init.c b/net/ip/net_init.c
index d8891a7..271947f 100644
--- a/net/ip/net_init.c
+++ b/net/ip/net_init.c
@@ -41,6 +41,7 @@
 
 #include <nanokernel.h>
 #include <toolchain.h>
+#include <sections.h>
 #include <string.h>
 #include <errno.h>
 
@@ -68,8 +69,8 @@
  * FIXME: stack size needs fine-tuning
  */
 #define STACKSIZE 2048
-static char rx_fiber_stack[STACKSIZE];
-static char tx_fiber_stack[STACKSIZE];
+static char __noinit rx_fiber_stack[STACKSIZE];
+static char __noinit tx_fiber_stack[STACKSIZE];
 
 static struct net_dev {
 	/* Queue for incoming packets from driver */