MAINTAINERS: Add qtest/arm-cpu-features.c to ARM TCG CPUs section

We want the ARM maintainers and the qemu-arm@ list to be
notified when this file is modified. Add an entry to the
'ARM TCG CPUs' section in the MAINTAINERS file.

Acked-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20210526170432.343588-2-philmd@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

MAINTAINERS

@@ -155,6 +155,7 @@ S: Maintained
 F: target/arm/
 F: tests/tcg/arm/
 F: tests/tcg/aarch64/
+F: tests/qtest/arm-cpu-features.c
 F: hw/arm/
 F: hw/cpu/a*mpcore.c
 F: include/hw/cpu/a*mpcore.h