mpc83xx: immap_83xx: add spi8xxx_t in immap for mpc8309

Allow drivers/spi/mpc8xxx_spi.c to be built for an mpc8309 target.

Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Reviewed-by: Mario Six <mario.six@gdsys.cc>
diff --git a/arch/powerpc/include/asm/mpc8xxx_spi.h b/arch/powerpc/include/asm/mpc8xxx_spi.h
index b583a32..470ee95 100644
--- a/arch/powerpc/include/asm/mpc8xxx_spi.h
+++ b/arch/powerpc/include/asm/mpc8xxx_spi.h
@@ -11,6 +11,7 @@
 #include <asm/types.h>
 
 #if defined(CONFIG_ARCH_MPC8308) || \
+	defined(CONFIG_ARCH_MPC8309) || \
 	defined(CONFIG_ARCH_MPC8313) || \
 	defined(CONFIG_ARCH_MPC8315) || \
 	defined(CONFIG_ARCH_MPC834X) || \