PXA: Fix missing includes

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>

board/colibri_pxa270/colibri_pxa270.c

@@ -21,6 +21,7 @@
 
 #include <common.h>
 #include <asm/arch/hardware.h>
+#include <netdev.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 

board/vpac270/vpac270.c

@@ -30,6 +30,7 @@
 
 #include <common.h>
 #include <asm/arch/hardware.h>
+#include <netdev.h>
 
 DECLARE_GLOBAL_DATA_PTR;