[test] enable uart flow control in power virus test

Signed-off-by: Timothy Trippel <[email protected]>

Author: timothytrippel

sw/device/tests/power_virus_systemtest.c

@@ -45,6 +45,7 @@
 #include "uart_regs.h"     // Generated.
 
 OTTF_DEFINE_TEST_CONFIG(.enable_concurrency = true,
+                        .enable_uart_flow_control = true,
                         .can_clobber_uart = false, );
 
 /**

sw/host/tests/chip/power_virus/src/main.rs

@@ -69,6 +69,7 @@ fn main() -> Result<()> {
     opts.init.init_logging();
     let transport = opts.init.init_target()?;
     let uart = transport.uart("console")?;
+    uart.set_flow_control(true)?;
     let _ = UartConsole::wait_for(&*uart, r"Running [^\r\n]*", opts.timeout)?;
 
     execute_test!(power_virus_systemtest, &opts, &transport);