x86/vMSI-X: drop pci_msix_get_table_len()

We can calculate the needed value at the single use site more easily.

Signed-off-by: Jan Beulich <jbeulich@suse.com>

--- a/xen/arch/x86/hvm/vmsi.c
+++ b/xen/arch/x86/hvm/vmsi.c
@@ -411,7 +411,7 @@ static void add_msixtbl_entry(struct dom
     INIT_RCU_HEAD(&entry->rcu);
     atomic_set(&entry->refcnt, 0);
 
-    entry->table_len = pci_msix_get_table_len(pdev);
+    entry->table_len = pdev->msix->nr_entries * PCI_MSIX_ENTRY_SIZE;
     entry->pdev = pdev;
     entry->gtable = (unsigned long) gtable;
 
--- a/xen/arch/x86/msi.c
+++ b/xen/arch/x86/msi.c
@@ -1463,27 +1463,6 @@ int pci_restore_msi_state(struct pci_dev
     return 0;
 }
 
-unsigned int pci_msix_get_table_len(struct pci_dev *pdev)
-{
-    int pos;
-    u16 control, seg = pdev->seg;
-    u8 bus, slot, func;
-    unsigned int len;
-
-    bus = pdev->bus;
-    slot = PCI_SLOT(pdev->devfn);
-    func = PCI_FUNC(pdev->devfn);
-
-    pos = pci_find_cap_offset(seg, bus, slot, func, PCI_CAP_ID_MSIX);
-    if ( !pos || !use_msi )
-        return 0;
-
-    control = pci_conf_read16(seg, bus, slot, func, msix_control_reg(pos));
-    len = msix_table_size(control) * PCI_MSIX_ENTRY_SIZE;
-
-    return len;
-}
-
 static int msi_cpu_callback(
     struct notifier_block *nfb, unsigned long action, void *hcpu)
 {
--- a/xen/include/asm-x86/msi.h
+++ b/xen/include/asm-x86/msi.h
@@ -91,8 +91,6 @@ extern void teardown_msi_irq(int irq);
 extern int msi_free_vector(struct msi_desc *entry);
 extern int pci_restore_msi_state(struct pci_dev *pdev);
 
-extern unsigned int pci_msix_get_table_len(struct pci_dev *pdev);
-
 struct msi_desc {
 	struct msi_attrib {
 		__u8	type;		/* {0: unused, 5h:MSI, 11h:MSI-X} */