lib/vsprintf: Remove support for %pF and %pf in favour of %pS and %ps

%pS and %ps are now the preferred conversion specifiers to print function
names. The functionality is equivalent; remove the old, deprecated %pF
and %pf support.

Depends-on: commit 2d44d165 ("scsi: lpfc: Convert existing %pf users to %ps")
Depends-on: commit b295c3e3 ("tools lib traceevent: Convert remaining %p[fF] users to %p[sS]")
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>