Use the symbolic constants for the window registers in pci configuration space in pccbb_winset(), instead of their bare values. Saves time for grep users. While there, a few grammar and typo fixes in comments.
Use the symbolic constants for the window registers in pci configuration
space in pccbb_winset(), instead of their bare values. Saves time for grep
users. While there, a few grammar and typo fixes in comments.

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars