MAINTAINERS: add myself as Maintainer of the Generic System Interconnect Subsystem

I'll maintain the Interconnect subsystem.

Link: https://patch.msgid.link/20251120-topic-interconnect-next-v5-3-e8a82720da5d@linaro.org
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>

MAINTAINERS

@@ -1259,6 +1259,17 @@ S:	Maintained
 F:	drivers/misc/gsc.c
 F:	include/gsc.h
 
+INTERCONNECT:
+M:	Neil Armstrong <neil.armstrong@linaro.org>
+S:	Maintained
+T:	git https://source.denx.de/u-boot/u-boot.git
+F:	arch/sandbox/include/asm/interconnect.h
+F:	doc/api/interconnect.rst
+F:	drivers/interconnect/
+F:	include/interconnect-uclass.h
+F:	include/interconnect.h
+F:	test/dm/interconnect.c
+
 I2C
 M:	Heiko Schocher <hs@nabladev.com>
 S:	Maintained