iommu/vt-d: Remove unused extern declaration dmar_parse_dev_scope()

Since commit 2e45528 ("iommu/vt-d: Unify the way to process DMAR
device scope array") this is not used anymore, so can remove it.

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20230802133934.19712-1-yuehaibing@huawei.com
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

Author: YueHaibing

include/linux/dmar.h

@@ -106,8 +106,6 @@ static inline bool dmar_rcu_check(void)
 extern int dmar_table_init(void);
 extern int dmar_dev_scope_init(void);
 extern void dmar_register_bus_notifier(void);
-extern int dmar_parse_dev_scope(void *start, void *end, int *cnt,
-				struct dmar_dev_scope **devices, u16 segment);
 extern void *dmar_alloc_dev_scope(void *start, void *end, int *cnt);
 extern void dmar_free_dev_scope(struct dmar_dev_scope **devices, int *cnt);
 extern int dmar_insert_dev_scope(struct dmar_pci_notify_info *info,