Switch to modular includes for generator.

Change-Id: Ie2926938912400b86c32733f04d59377c447c66c
diff --git a/generator/sections/gen-section-pcie.c b/generator/sections/gen-section-pcie.c
index cace516..aa1be6b 100644
--- a/generator/sections/gen-section-pcie.c
+++ b/generator/sections/gen-section-pcie.c
@@ -7,7 +7,7 @@
 #include <stdlib.h>
 #include "../../edk/BaseTypes.h"
 #include "../gen-utils.h"
-#include "gen-sections.h"
+#include "gen-section.h"
 
 #define PCIE_PORT_TYPES (int []){0, 1, 4, 5, 6, 7, 8, 9, 10}