staging/lynxfb: Use pci aperture helper

It exists! Note that since this is an exact copy, there shouldn't be
any functional difference here.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Cc: Teddy Wang <teddy.wang@siliconmotion.com>
Cc: linux-fbdev@vger.kernel.org
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20230111154112.90575-6-daniel.vetter@ffwll.ch

drivers/staging/sm750fb/sm750.c

@@ -989,20 +989,6 @@ static int sm750fb_framebuffer_alloc(struct sm750_dev *sm750_dev, int fbidx)
 	return err;
 }
 
-static int lynxfb_kick_out_firmware_fb(struct pci_dev *pdev)
-{
-	resource_size_t base = pci_resource_start(pdev, 0);
-	resource_size_t size = pci_resource_len(pdev, 0);
-	bool primary = false;
-
-#ifdef CONFIG_X86
-	primary = pdev->resource[PCI_ROM_RESOURCE].flags &
-					IORESOURCE_ROM_SHADOW;
-#endif
-
-	return aperture_remove_conflicting_devices(base, size, primary, "sm750_fb1");
-}
-
 static int lynxfb_pci_probe(struct pci_dev *pdev,
 			    const struct pci_device_id *ent)
 {
@@ -1011,7 +997,7 @@ static int lynxfb_pci_probe(struct pci_dev *pdev,
 	int fbidx;
 	int err;
 
-	err = lynxfb_kick_out_firmware_fb(pdev);
+	err = aperture_remove_conflicting_pci_devices(pdev, "sm750_fb1");
 	if (err)
 		return err;