pmc(3): add additional references for libpmc functions in the SEE ALSO section

These functions are already referenced throughout the manpage -- this makes their
presence more apparent.

MFC after:	2 months
Sponsored by:	Dell EMC Isilon

lib/libpmc/pmc.3

@@ -23,7 +23,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd July 28, 2014
+.Dd April 6, 2017
 .Dt PMC 3
 .Os
 .Sh NAME
@@ -546,6 +546,19 @@ API is
 .Xr pmc.westmere 3 ,
 .Xr pmc.westmereuc 3 ,
 .Xr pmc.xscale 3 ,
+.Xr pmc_allocate 3 ,
+.Xr pmc_attach 3 ,
+.Xr pmc_capabilities 3 ,
+.Xr pmc_configure_logfile 3 ,
+.Xr pmc_disable 3 ,
+.Xr pmc_event_names_of_class 3 ,
+.Xr pmc_get_driver_stats 3 ,
+.Xr pmc_get_msr 3 ,
+.Xr pmc_init 3 ,
+.Xr pmc_name_of_capability 3 ,
+.Xr pmc_read 3 ,
+.Xr pmc_set 3 ,
+.Xr pmc_start 3 ,
 .Xr pmclog 3 ,
 .Xr hwpmc 4 ,
 .Xr pmccontrol 8 ,