sim:tests: Update seL4 UART assignment

To match the new SMC UART assignment.

Tested with `./sim/tests/test.sh sim/tests/shodan_boot.robot`

Change-Id: I67e8aad19b15ed85d2677b577637a05a23730688

shodan_boot.robot

diff --git a/shodan_boot.robot b/shodan_boot.robot
index 9e146dc..e8c135c 100644
--- a/shodan_boot.robot
+++ b/shodan_boot.robot
@@ -14,6 +14,7 @@
 ${UART1}                         sysbus.uart1
 ${UART2}                         sysbus.uart2
 ${UART3}                         sysbus.uart3
+${UART5}                         sysbus.uart5
 
 *** Keywords ***
 Prepare Machine
@@ -30,7 +31,7 @@
     Prepare Machine
     Create Log Tester           ${LOG_TIMEOUT}
     ${tockuart}=                Create Terminal Tester        ${UART0}
-    ${sel4uart}=                Create Terminal Tester        ${UART1}
+    ${sel4uart}=                Create Terminal Tester        ${UART5}
     Start Emulation
 
     Wait For Line On Uart       Booting sel4 from TockOS app done!               testerId=${tockuart}