sysrq: temporarily disable showing stacks of active CPUs [1/1]

PD#SWPL-7711

Problem:
echo l > /proc/sysrq-trigger leading to kernel crash and
lockup

Solution:
temporarily disable showing stacks of active CPUs

Verify:
U200

Change-Id: Id7f19425d754d9249b3999189dd257f8b30bae2d
Signed-off-by: Jiamin Ma <jiamin.ma@amlogic.com>

drivers/tty/sysrq.c

@@ -257,6 +257,13 @@ static DECLARE_WORK(sysrq_showallcpus, sysrq_showregs_othercpus);
 
 static void sysrq_handle_showallcpus(int key)
 {
+	/*
+	 * Temporarily disable this function
+	 * Remove it later
+	 */
+#ifdef CONFIG_AMLOGIC_MODIFY
+	return;
+#endif
 	/*
 	 * Fall back to the workqueue based printing if the
 	 * backtrace printing did not succeed or the