misc: habanalabs: firmware_if: Add missing 'fw_name' and 'dst' entries to function header

Looks as though documentation for these function arguments have
been missing since the driver's inception last year.

Fixes the following W=1 kernel build warnings:

 drivers/misc/habanalabs/firmware_if.c:26: warning: Function parameter or member 'fw_name' not described in 'hl_fw_load_fw_to_device'
 drivers/misc/habanalabs/firmware_if.c:26: warning: Function parameter or member 'dst' not described in 'hl_fw_load_fw_to_device'

Cc: Oded Gabbay <oded.gabbay@gmail.com>
Cc: Tomer Tayar <ttayar@habana.ai>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Link: https://lore.kernel.org/r/20200701085853.164358-4-lee.jones@linaro.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/misc/habanalabs/firmware_if.c

@@ -15,7 +15,10 @@
 
 /**
  * hl_fw_load_fw_to_device() - Load F/W code to device's memory.
+ *
  * @hdev: pointer to hl_device structure.
+ * @fw_name: the firmware image name
+ * @dst: IO memory mapped address space to copy firmware to
  *
  * Copy fw code from firmware file to device memory.
  *