arm64: zynqmp: Use mailbox driver for PMUFW config loading

With new mailbox driver PMUFW configuration object can be loaded via the
same interface and there is no need to have pmu_ipc.c completely.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Luca Ceresoli <luca@lucaceresoli.net>

include/zynqmp_firmware.h

@@ -32,5 +32,6 @@ enum pm_api_id {
 #define PMUFW_V1_0      ((1 << ZYNQMP_PM_VERSION_MAJOR_SHIFT) | 0)
 
 unsigned int zynqmp_firmware_version(void);
+void zynqmp_pmufw_load_config_object(const void *cfg_obj, size_t size);
 
 #endif /* _ZYNQMP_FIRMWARE_H_ */