VMWareBackdoor: Use dbg() instead of dbgprintf()

Author: https://github.com/supercomputer7
Commit: 9ee6d00b57
Pull-request: https://github.com/SerenityOS/serenity/pull/1290

Kernel/Devices/VMWareBackdoor.cpp

@@ -145,7 +145,7 @@ void VMWareBackdoor::enable_absolute_vmmouse()
     InterruptDisabler disabler;
     if (!supported() || !detect_vmmouse())
         return;
-    dbgprintf("Enabling vmmouse, absolute mode\n");
+    dbg() << "Enabling vmmouse, absolute mode";
 
     VMWareCommand command;