Several of these messages we coded using line continuation within a
string literal. This is generally not recommended and also lead to odd
sequences of many blanks in the middle of the messages.
The message indicating a discarded write due to MSI-X already being
enabled doesn't need to be issued when a write doesn't actually modify
the current value. Adjust the surrounding logic accordingly, and
eliminate some redundancy as well as the sometimes unnecessary access
to the physical MSI-X table.
Finally, adjust the wording of a few messages to be more precise and/or
more useful.
Signed-off-by: Jan Beulich <jbeulich@suse.com> Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>