rapidio/tsi721: 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.

Link: https://lkml.kernel.org/r/20230323113711.10523-1-cai.huoqing@linux.devSigned-off-by: Cai Huoqing <cai.huoqing@linux.dev>
Cc: Alexandre Bounine <alex.bou9@gmail.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

drivers/rapidio/devices/tsi721.c

@@ -2924,7 +2924,6 @@ static int tsi721_probe(struct pci_dev *pdev,
 		iounmap(priv->odb_base);
 err_free_res:
 	pci_release_regions(pdev);
-	pci_clear_master(pdev);
 err_disable_pdev:
 	pci_disable_device(pdev);
 err_clean:
@@ -2962,7 +2961,6 @@ static void tsi721_remove(struct pci_dev *pdev)
 		pci_disable_msi(priv->pdev);
 #endif
 	pci_release_regions(pdev);
-	pci_clear_master(pdev);
 	pci_disable_device(pdev);
 	pci_set_drvdata(pdev, NULL);
 	kfree(priv);
@@ -2977,7 +2975,6 @@ static void tsi721_shutdown(struct pci_dev *pdev)
 
 	tsi721_disable_ints(priv);
 	tsi721_dma_stop_all(priv);
-	pci_clear_master(pdev);
 	pci_disable_device(pdev);
 }