fix(a380x/pfd): Inverted meter altitude indicator color below and above the MDA

[ItzARz]

Fixes #9712

Summary of Changes

Updated the comparison logic to ensure AMBER color is shown when the altitude is below MDA, and green when above it.

Screenshots (if necessary)

References

Additional context

Testing instructions

1. Push 'meter' button in the AFS Panel.
2. Check the PFD, the meter altitude indicator should be in GREEN color above the MDA and AMBER below.

How to download the PR for QA

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[ItzARz]

Note: It will show the altitude in BLUE above the MDA.
I tested this with the changes by #9707 and its working as expected showing the altitude in GREEN above the MDA.

Above

Below