pcie: consistent names for function args

The function declarations for pci_cap_slot_get and
pci_cap_slot_write_config call the argument "slot_ctl", but the function
definitions and all the call sites drop the 'o' and call it "slt_ctl".
Let's be consistent.

Reported-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>

include/hw/pci/pcie.h

@@ -107,9 +107,9 @@ void pcie_cap_lnkctl_reset(PCIDevice *dev);
 
 void pcie_cap_slot_init(PCIDevice *dev, uint16_t slot);
 void pcie_cap_slot_reset(PCIDevice *dev);
-void pcie_cap_slot_get(PCIDevice *dev, uint16_t *slot_ctl, uint16_t *slt_sta);
+void pcie_cap_slot_get(PCIDevice *dev, uint16_t *slt_ctl, uint16_t *slt_sta);
 void pcie_cap_slot_write_config(PCIDevice *dev,
-                                uint16_t old_slot_ctl, uint16_t old_slt_sta,
+                                uint16_t old_slt_ctl, uint16_t old_slt_sta,
                                 uint32_t addr, uint32_t val, int len);
 int pcie_cap_slot_post_load(void *opaque, int version_id);
 void pcie_cap_slot_push_attention_button(PCIDevice *dev);