PCI: Fix comment typo for pci_add_cap_save_buffer()

Fix trivial comment typo for pci_add_cap_save_buffer().

Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index e37fea6..69dcd32 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -1992,7 +1992,7 @@
 }
 
 /**
- * pci_add_save_buffer - allocate buffer for saving given capability registers
+ * pci_add_cap_save_buffer - allocate buffer for saving given capability registers
  * @dev: the PCI device
  * @cap: the capability to allocate the buffer for
  * @size: requested size of the buffer