mpc83xx: set MPC83XX_GPIO_CTRLRS to 2 for MPC8309

The MPC8309 has two gpio controllers (which is already correctly
reflected in its struct immap definition).

Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Reviewed-by: Mario Six <mario.six@gdsys.cc>
diff --git a/arch/powerpc/include/asm/arch-mpc83xx/gpio.h b/arch/powerpc/include/asm/arch-mpc83xx/gpio.h
index 385d651..8a6896e 100644
--- a/arch/powerpc/include/asm/arch-mpc83xx/gpio.h
+++ b/arch/powerpc/include/asm/arch-mpc83xx/gpio.h
@@ -9,7 +9,8 @@
 #if defined(CONFIG_ARCH_MPC8313) || defined(CONFIG_ARCH_MPC8308) || \
 	defined(CONFIG_ARCH_MPC8315)
 #define MPC83XX_GPIO_CTRLRS 1
-#elif defined(CONFIG_ARCH_MPC834X) || defined(CONFIG_ARCH_MPC837X)
+#elif defined(CONFIG_ARCH_MPC834X) || defined(CONFIG_ARCH_MPC837X) || \
+	defined(CONFIG_ARCH_MPC8309)
 #define MPC83XX_GPIO_CTRLRS 2
 #else
 #define MPC83XX_GPIO_CTRLRS 0