boot.sh: reduce parsing timeout to 5 mins

When $AUTOMATE is true (-j true), boot.sh script parses the console with
a timeout of 7200 seconds (2 hours). Busybox boot generally doesn't take
2 hours to complete. Reduce the timeout to 5 minutes from 2 hours so
that when the busybox boot doesn't reach till the console prompt,
parsing waits for only 5 minutes before killing the model. This results
in better utilization of jenkins jobs.

Change-Id: I3ddfe551602f5326ef8e201aa12537a1fdf03aae
Signed-off-by: Vijayenthiran Subramaniam <vijayenthiran.subramaniam@arm.com>

sgi/boot.sh

@@ -114,7 +114,7 @@ if [ "$MODEL_PID" == "0" ] ; then
 fi
 
 # wait for boot to complete and the model to be killed
-parse_log_file "$PWD/$platform/$UART0_ARMTF_OUTPUT_FILE_NAME" "/ #" 7200
+parse_log_file "$PWD/$platform/$UART0_ARMTF_OUTPUT_FILE_NAME" "/ #" 300
 ret=$?
 
 kill_model