vgaarb: remove vga_conflicts

vga_conflicts only has a single caller and none of the arch overrides
mentioned in the comment.  Just remove it and the thus dead check in the
caller.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20210716061634.2446357-3-hch@lst.deAcked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Christian König <christian.koenig@amd.com>

drivers/gpu/vga/vgaarb.c

@@ -284,12 +284,6 @@ static struct vga_device *__vga_tryget(struct vga_device *vgadev,
 		if (vgadev == conflict)
 			continue;
 
-		/* Check if the architecture allows a conflict between those
-		 * 2 devices or if they are on separate domains
-		 */
-		if (!vga_conflicts(vgadev->pdev, conflict->pdev))
-			continue;
-
 		/* We have a possible conflict. before we go further, we must
 		 * check if we sit on the same bus as the conflicting device.
 		 * if we don't, then we must tie both IO and MEM resources

include/linux/vgaarb.h

@@ -122,18 +122,6 @@ static inline void vga_set_default_device(struct pci_dev *pdev) { }
 static inline int vga_remove_vgacon(struct pci_dev *pdev) { return 0; }
 #endif
 
-/*
- * Architectures should define this if they have several
- * independent PCI domains that can afford concurrent VGA
- * decoding
- */
-#ifndef __ARCH_HAS_VGA_CONFLICT
-static inline int vga_conflicts(struct pci_dev *p1, struct pci_dev *p2)
-{
-       return 1;
-}
-#endif
-
 #if defined(CONFIG_VGA_ARB)
 int vga_client_register(struct pci_dev *pdev, void *cookie,
 			void (*irq_set_state)(void *cookie, bool state),