net/fungible: Remove redundant pci_clear_master

Remove pci_clear_master to simplify the code,
the bus-mastering is also cleared in do_pci_disable_device,
like this:
./drivers/pci/pci.c:2197
static void do_pci_disable_device(struct pci_dev *dev)
{
	u16 pci_command;

	pci_read_config_word(dev, PCI_COMMAND, &pci_command);
	if (pci_command & PCI_COMMAND_MASTER) {
		pci_command &= ~PCI_COMMAND_MASTER;
		pci_write_config_word(dev, PCI_COMMAND, pci_command);
	}

	pcibios_disable_device(dev);
}.
And dev->is_busmaster is set to 0 in pci_disable_device.
Signed-off-by: Cai Huoqing <cai.huoqing@linux.dev>
Acked-by: Dimitris Michailidis <dmichail@fungible.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/fungible/funcore/fun_dev.c

@@ -746,7 +746,6 @@ void fun_dev_disable(struct fun_dev *fdev)
 	bitmap_free(fdev->irq_map);
 	pci_free_irq_vectors(pdev);
 
-	pci_clear_master(pdev);
 	pci_disable_device(pdev);
 
 	fun_unmap_bars(fdev);
@@ -821,7 +820,6 @@ int fun_dev_enable(struct fun_dev *fdev, struct pci_dev *pdev,
 disable_admin:
 	fun_disable_admin_queue(fdev);
 free_irq_mgr:
-	pci_clear_master(pdev);
 	bitmap_free(fdev->irq_map);
 free_irqs:
 	pci_free_irq_vectors(pdev);