drivers/rpmsg: no need check held status after change to rmutex

metal_mutex has been changed to rmutex_t, so do not need check
the held status again.

Signed-off-by: Bowen Wang <wangbowen6@xiaomi.com>

Author: CV-Bowen

drivers/rpmsg/rpmsg_port.c

@@ -812,8 +812,7 @@ static void rpmsg_port_dump(FAR struct rpmsg_s *rpmsg)
   FAR struct metal_list *node;
   bool needunlock = false;
 
-  if (!up_interrupt_context() && !sched_idletask() &&
-      !nxmutex_is_hold(&rdev->lock))
+  if (!up_interrupt_context() && !sched_idletask())
     {
       metal_mutex_acquire(&rdev->lock);
       needunlock = true;

drivers/rpmsg/rpmsg_virtio_lite.c

@@ -496,8 +496,7 @@ static void rpmsg_virtio_lite_dump(FAR struct rpmsg_s *rpmsg)
       return;
     }
 
-  if (up_interrupt_context() || sched_idletask() ||
-      nxmutex_is_hold(&rdev->lock))
+  if (up_interrupt_context() || sched_idletask())
     {
       needlock = false;
     }

drivers/rptun/rptun.c

@@ -711,8 +711,7 @@ static void rptun_dump(FAR struct rpmsg_s *rpmsg)
       return;
     }
 
-  if (up_interrupt_context() || sched_idletask() ||
-      nxmutex_is_hold(&rdev->lock))
+  if (up_interrupt_context() || sched_idletask())
     {
       needlock = false;
     }