habanalabs: rename mmu.c to mmu_v1.c

In the future we will have MMU v2 code, so we need to prepare the
driver for it. The first step is to rename the current MMU file to
mmu_v1.c.

Signed-off-by: Moti Haimovski <mhaimovski@habana.ai>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>

drivers/misc/habanalabs/common/Makefile

@@ -3,5 +3,5 @@ HL_COMMON_FILES := common/habanalabs_drv.o common/device.o common/context.o \
 		common/asid.o common/habanalabs_ioctl.o \
 		common/command_buffer.o common/hw_queue.o common/irq.o \
 		common/sysfs.o common/hwmon.o common/memory.o \
-		common/command_submission.o common/mmu.o common/firmware_if.o \
-		common/pci.o
+		common/command_submission.o common/mmu_v1.o \
+		common/firmware_if.o common/pci.o