drm_hwcomposer: Fix missing connector state assignment

It was accidentally removed by my previous commit. Restore it.

Fixes: a148f21336ad ("drm_hwcomposer: Rework display modes handling")
Signed-off-by: Roman Stratiienko <roman.o.stratiienko@globallogic.com>
diff --git a/drm/DrmConnector.cpp b/drm/DrmConnector.cpp
index 32b6d24..bd5277f 100644
--- a/drm/DrmConnector.cpp
+++ b/drm/DrmConnector.cpp
@@ -175,6 +175,8 @@
     return -ENODEV;
   }
 
+  state_ = c->connection;
+
   modes_.clear();
   for (int i = 0; i < c->count_modes; ++i) {
     bool exists = false;