habanalabs: hl_pci_set_dma_mask() can be static

set function to be static as it is not called from outside its file.

Signed-off-by: kbuild test robot <lkp@intel.com>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>