e1000e: use local path for local headers

When pulling in headers that are in the same directory as the C file (as
opposed to one in include/), we should use its relative path, without a
directory.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
diff --git a/hw/net/e1000e.c b/hw/net/e1000e.c
index 16a9417..cda8d48 100644
--- a/hw/net/e1000e.c
+++ b/hw/net/e1000e.c
@@ -41,7 +41,7 @@
 #include "hw/pci/msi.h"
 #include "hw/pci/msix.h"
 
-#include "hw/net/e1000_regs.h"
+#include "e1000_regs.h"
 
 #include "e1000x_common.h"
 #include "e1000e_core.h"