MAINTAINERS: Add include/linux/tnum.h to BPF CORE

Maintainers of the kerne/bpf/tnum.c are also the maintainers of the
corresponding header file include/linux/tnum.h.

Add the file entry for include/linux/tnum.h to the appropriate section
in MAINTAINERS.

Signed-off-by: Shung-Hsi Yu <[email protected]>
Signed-off-by: Daniel Borkmann <[email protected]>
Link: https://lore.kernel.org/bpf/[email protected]

Author: shunghsiyu

MAINTAINERS

@@ -3824,6 +3824,7 @@ F:	kernel/bpf/dispatcher.c
 F:	kernel/bpf/trampoline.c
 F:	include/linux/bpf*
 F:	include/linux/filter.h
+F:	include/linux/tnum.h
 
 BPF [BTF]
 M:	Martin KaFai Lau <[email protected]>