arm: omap2: add missing #include <netdev.h>

emac.c implements cpu_eth_init() so it needs to pull the corresponding
header file.

Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Peter Robinson <pbrobinson@gmail.com>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
diff --git a/arch/arm/mach-omap2/omap3/emac.c b/arch/arm/mach-omap2/omap3/emac.c
index 7348e92..1e30a06 100644
--- a/arch/arm/mach-omap2/omap3/emac.c
+++ b/arch/arm/mach-omap2/omap3/emac.c
@@ -9,6 +9,7 @@
 #include <net.h>
 #include <asm/io.h>
 #include <asm/arch/am35x_def.h>
+#include <netdev.h>
 
 /*
  * Initializes on-chip ethernet controllers.