arm: a9mpcore: Coreify the SCU

Split the SCU in a9mpcore out into its own object definition. mpcore is now
just a container for the mpcore components.

Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

hw/arm/Makefile.objs

@@ -3,6 +3,7 @@ obj-y += arm_boot.o
 obj-y += xilinx_zynq.o zynq_slcr.o
 obj-y += xilinx_spips.o
 obj-y += arm_gic.o arm_gic_common.o
+obj-y += a9scu.o
 obj-y += realview_gic.o realview.o arm_sysctl.o arm11mpcore.o a9mpcore.o
 obj-y += exynos4210_gic.o exynos4210_combiner.o exynos4210.o
 obj-y += exynos4_boards.o exynos4210_uart.o exynos4210_pwm.o