PCI: Remove set but unused variable

Remove a set but unused variable in quirks.c.  Fixes warning:

  variable ‘mmio_sys_info’ set but not used [-Wunused-but-set-variable]

Signed-off-by: Joshua Abraham <j.abraham1776@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

drivers/pci/quirks.c

@@ -4987,7 +4987,6 @@ static void quirk_switchtec_ntb_dma_alias(struct pci_dev *pdev)
 	void __iomem *mmio;
 	struct ntb_info_regs __iomem *mmio_ntb;
 	struct ntb_ctrl_regs __iomem *mmio_ctrl;
-	struct sys_info_regs __iomem *mmio_sys_info;
 	u64 partition_map;
 	u8 partition;
 	int pp;
@@ -5008,7 +5007,6 @@ static void quirk_switchtec_ntb_dma_alias(struct pci_dev *pdev)
 
 	mmio_ntb = mmio + SWITCHTEC_GAS_NTB_OFFSET;
 	mmio_ctrl = (void __iomem *) mmio_ntb + SWITCHTEC_NTB_REG_CTRL_OFFSET;
-	mmio_sys_info = mmio + SWITCHTEC_GAS_SYS_INFO_OFFSET;
 
 	partition = ioread8(&mmio_ntb->partition_id);