firmware: arm_ffa: Set dma_mask for ffa devices

Set dma_mask for FFA devices, otherwise DMA allocation using the device pointer
lead to following warning:

WARNING: CPU: 1 PID: 1 at kernel/dma/mapping.c:597 dma_alloc_attrs+0xe0/0x124

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Message-Id: <e3dd8042ac680bd74b6580c25df855d092079c18.1737107520.git.viresh.kumar@linaro.org>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>

Author: vireshk

drivers/firmware/arm_ffa/bus.c

@@ -212,6 +212,7 @@ ffa_device_register(const struct ffa_partition_info *part_info,
 	dev = &ffa_dev->dev;
 	dev->bus = &ffa_bus_type;
 	dev->release = ffa_release_device;
+	dev->dma_mask = &dev->coherent_dma_mask;
 	dev_set_name(&ffa_dev->dev, "arm-ffa-%d", id);
 
 	ffa_dev->id = id;