perf/x86/intel: Add missing MODULE_DESCRIPTION() lines

Fix the 'make W=1 C=1' warnings:

WARNING: modpost: missing MODULE_DESCRIPTION() in arch/x86/events/intel/intel-uncore.o
WARNING: modpost: missing MODULE_DESCRIPTION() in arch/x86/events/intel/intel-cstate.o

Signed-off-by: Jeff Johnson <[e-mail]>
Signed-off-by: Ingo Molnar <[e-mail]>
Cc: Peter Zijlstra <[e-mail]>
Cc: Arnaldo Carvalho de Melo <[e-mail]>
Cc: Alexander Shishkin <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

arch/x86/events/intel/cstate.c

···
 #include "../perf_event.h"
 #include "../probe.h"
 
+MODULE_DESCRIPTION("Support for Intel cstate performance events");
 MODULE_LICENSE("GPL");
 
 #define DEFINE_CSTATE_FORMAT_ATTR(_var, _name, _format)		\

arch/x86/events/intel/uncore.c

···
 struct event_constraint uncore_constraint_empty =
 	EVENT_CONSTRAINT(0, 0, 0);
 
+MODULE_DESCRIPTION("Support for Intel uncore performance events");
 MODULE_LICENSE("GPL");
 
 int uncore_pcibus_to_dieid(struct pci_bus *bus)