ifpps: align string to format string

Just a whitespace fix to align the strings to the fmt string.

Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
ifpps: align avg numbers and remove unit

In order to get a better overview, lets align the avg numbers to the
other shown decimals. However, for this we would need to remove the
avg units as we deal with floats here. But we know the units from the
above numbers anyway. I think this makes it more clear to follow.

Signed-off-by: Daniel Borkmann <dborkman@redhat.com>