module: add symbol-name to pr_debug Absolute symbol

The pr_debug("Absolute symbol" ..) reports value, (which is usually
0), but not the name, which is more informative.  So add it.

no functional changes

Signed-off-by: Jim Cromie <jim.cromie@gmail.com>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>