drm_hwcomposer: Rename DrmResources to DrmDevice

DrmDevice is a better name to reflect the fact that DrmResources/
DrmDevice can handle just one dri node.

Suggested here [1] by Sean Paul.
[1] https://lists.freedesktop.org/archives/dri-devel/2018-April/173290.html

Signed-off-by: Alexandru Gheorghe <alexandru-cosmin.gheorghe@arm.com>
diff --git a/platformdrmgeneric.h b/platformdrmgeneric.h
index 0339e1e..8701329 100644
--- a/platformdrmgeneric.h
+++ b/platformdrmgeneric.h
@@ -17,7 +17,7 @@
 #ifndef ANDROID_PLATFORM_DRM_GENERIC_H_
 #define ANDROID_PLATFORM_DRM_GENERIC_H_
 
-#include "drmresources.h"
+#include "drmdevice.h"
 #include "platform.h"
 
 #include <hardware/gralloc.h>
@@ -26,7 +26,7 @@
 
 class DrmGenericImporter : public Importer {
  public:
-  DrmGenericImporter(DrmResources *drm);
+  DrmGenericImporter(DrmDevice *drm);
   ~DrmGenericImporter() override;
 
   int Init();
@@ -36,8 +36,7 @@
 
   uint32_t ConvertHalFormatToDrm(uint32_t hal_format);
  private:
-
-  DrmResources *drm_;
+  DrmDevice *drm_;
 
   const gralloc_module_t *gralloc_;
 };