[dts] [PATCH V2] framework/pmd_output:start_testpmd interface support expected params

[Ling Wei]

v1:
In DPDK 9af79db20f4cf,when launch virtio-user testpmd as server mode,
 virtio-user server side testpmd expected character will be 
'wait for client side started...', after client side started, 
it change to 'testpmd>'.

v2:
Modify patch comments style issues.

Signed-off-by: Ling Wei <weix.ling at intel.com>
---
 framework/pmd_output.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/framework/pmd_output.py b/framework/pmd_output.py
index 3daa86b..1ad4ce7 100644
--- a/framework/pmd_output.py
+++ b/framework/pmd_output.py
@@ -103,7 +103,7 @@ class PmdOutput():
     def get_pmd_cmd(self):
         return self.command
 
-    def start_testpmd(self, cores='default', param='', eal_param='', socket=0, fixed_prefix=False, **config):
+    def start_testpmd(self, cores='default', param='', eal_param='', socket=0, fixed_prefix=False, expected='testpmd> ', **config):
         """
         start testpmd with input parameters.
         :param cores: eg:
@@ -148,7 +148,7 @@ class PmdOutput():
         command = command.replace('  ', ' ')
         if self.session != self.dut:
             self.session.send_expect("cd %s" % self.dut.base_dir, "# ")
-        out = self.session.send_expect(command, "testpmd> ", 120)
+        out = self.session.send_expect(command, expected, 120)
         self.command = command
         # wait 10s to ensure links getting up before test start.
         sleep(10)
-- 
2.25.1