powerpc/rcpm: add RCPM driver

There is a RCPM (Run Control/Power Management) in Freescale QorIQ
series processors. The device performs tasks associated with device
run control and power management.

The driver implements some features: mask/unmask irq, enter/exit low
power states, freeze time base, etc.

Signed-off-by: Chenhui Zhao <chenhui.zhao@freescale.com>
Signed-off-by: Tang Yuantian <Yuantian.Tang@freescale.com>
[scottwood: remove __KERNEL__ ifdef]
Signed-off-by: Scott Wood <oss@buserror.net>

arch/powerpc/platforms/85xx/common.c

@@ -9,11 +9,14 @@
 #include <linux/of_irq.h>
 #include <linux/of_platform.h>
 
+#include <asm/fsl_pm.h>
 #include <soc/fsl/qe/qe.h>
 #include <sysdev/cpm2_pic.h>
 
 #include "mpc85xx.h"
 
+const struct fsl_pm_ops *qoriq_pm_ops;
+
 static const struct of_device_id mpc85xx_common_ids[] __initconst = {
 	{ .type = "soc", },
 	{ .compatible = "soc", },