misc: habanalabs: pci: Scrub documentation for non-present function argument

'dma_mask' is not passed directly into hl_pci_set_dma_mask() as
an argument.  Instead, it is pulled from struct hl_device *hdev.

Fixed the following W=1 warning:

 drivers/misc/habanalabs/pci.c:328: warning: Excess function parameter 'dma_mask' description in 'hl_pci_set_dma_mask

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/20200701085853.164358-8-lee.jones@linaro.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/misc/habanalabs/pci.c

@@ -317,7 +317,6 @@ int hl_pci_init_iatu(struct hl_device *hdev, u64 sram_base_address,
 /**
  * hl_pci_set_dma_mask() - Set DMA masks for the device.
  * @hdev: Pointer to hl_device structure.
- * @dma_mask: number of bits for the requested dma mask.
  *
  * This function sets the DMA masks (regular and consistent) for a specified
  * value. If it doesn't succeed, it tries to set it to a fall-back value