Changeset 11893:3615e7d15a81
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syscall_emul: style mods and small refactor to FDArray

Some members were defined as public when they should have been
privately declared so these were moved to the appropriate spot.

The operator[] had inline specified for for an in-class definition
which is redundant since inline definitions are always implicitly
inline.

Private members had the leading underscore applied to them to
denote that they're private (consistent with style guide).

Changed static const defined class variable into a constexpr
with brace-list initialization.