doc: clarify what a subsystem is

Clarify what a subsystem is, this has been missing the docs.

Signed-off-by: Anas Nashif <anas.nashif@intel.com>
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Anas Nashif 2024-04-12 07:01:55 -04:00 committed by Carles Cufí
commit 681e1d41e0
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@ -140,6 +140,10 @@ Glossary of Terms
A number of different :term:`SoCs <SoC>` that share similar characteristics and
features, and that the vendor typically names and markets together.
subsystem
A subsystem refers to a logically distinct part of the operating system
that handles specific functionality or provides certain services.
system power state
System power states describe the power consumption of the system as a
whole. System power states are represented by :c:enum:`pm_state`.