MAINTAINERS: fix folders within glob pattern

MAINTAINERS: fix folders within glob pattern

A "F: foo*" entry does not match any foo*/ folder nor its subtree,
another "F: foo*/" entry is needed for that.

Add missing foo*/ entries where an existing folder was ignored,
so this folder and its subtree is properly covered.

Arm tegra, Arm TI and Environment sections are affected.

Cc: Tom Rini <trini@konsulko.com>
Cc: Thierry Reding <treding@nvidia.com>
Cc: Svyatoslav Ryhel <clamor95@gmail.com>
Cc: Tom Rini <trini@konsulko.com>
Cc: Joe Hershberger <joe.hershberger@ni.com>
Signed-off-by: Anthony Loiseau <anthony.loiseau@allcircuits.com>