stmmac: intel: fix wrong kernel-doc

Kernel-doc for intel_eth_pci_remove is incorrect, pdev datatype is
struct pci_dev. Changed it to the 'pci device pointer'.

Signed-off-by: Wong Vee Khee <vee.khee.wong@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>