tree f95b28df0f0ed92a298e214766f3589ea2cb5545
parent 91344f31b72fd224d16f4e2b83eb845d29a7d317
author Abtin Keshavarzian <abtink@google.com> 1648235406 -0700
committer GitHub <noreply@github.com> 1648235406 -0700
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[mle] renames and smaller changes (#7515)

This commit contains small changes in `Mle`:

- Renames `mParentRequestMode` to `mAttachMode` (to match its type).
- Shortens `ParentRequestType` enumerator names.
- Changes `SendParentRequest()` to return `void`.
- Adds a protected method `Mle::Attach()` (which replaces
  the `BecomeChild()`).
- Moves `AttachMode` enum as a protected definition in `Mle`
  class itself and renames the `AttachMode` constants.