PCI: Fix whitespace, capitalization, and spelling errors

Fix whitespace, capitalization, and spelling errors.  No functional change.
I know "busses" is not an error, but "buses" was more common, so I used it
consistently.

Signed-off-by: Marta Rybczynska <rybczynska@gmail.com> (pci_reset_bridge_secondary_bus())
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c
index dfd1f59..92a49c2 100644
--- a/drivers/pci/pci-acpi.c
+++ b/drivers/pci/pci-acpi.c
@@ -141,7 +141,7 @@
  * if (_PRW at S-state x)
  *	choose from highest power _SxD to lowest power _SxW
  * else // no _PRW at S-state x
- * 	choose highest power _SxD or any lower power
+ *	choose highest power _SxD or any lower power
  */
 
 static pci_power_t acpi_pci_choose_state(struct pci_dev *pdev)