MAINTAINERS: add tlb trace events to MMU GATHER AND TLB INVALIDATION

The MMU GATHER AND TLB INVALIDATION entry lists other TLB-related files. 
Add the tlb.h tracepoint file there as well.

Link: https://lore.kernel.org/linux-mm/ce048e11-f79d-44a6-bacc-46e1ebc34b24@redhat.com/
Link: https://lkml.kernel.org/r/20250603-tlb-maintainers-v1-1-726d193c6693@columbia.edu
Signed-off-by: Tal Zussman <tz2294@columbia.edu>
Suggested-by: David Hildenbrand <david@redhat.com>
Acked-by: David Hildenbrand <david@redhat.com>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@kernel.org>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Author: tzussman

MAINTAINERS

@@ -16654,6 +16654,7 @@ L:	linux-mm@kvack.org
 S:	Maintained
 F:	arch/*/include/asm/tlb.h
 F:	include/asm-generic/tlb.h
+F:	include/trace/events/tlb.h
 F:	mm/mmu_gather.c
 
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