[optimize] simplify and beautify portBYTE_ALIGNMENT

[mysterywolf]

[optimize] simplify and beautify portBYTE_ALIGNMENT

Test Steps

tested on STM32

Related Issue

Negative

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[codecov]

Codecov Report

Merging #309 (1ac1780) into main (05ded5b) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #309   +/-   ##
=======================================
  Coverage   90.60%   90.60%           
=======================================
  Files           3        3           
  Lines         532      532           
  Branches      142      142           
=======================================
  Hits          482      482           
  Misses         14       14           
  Partials       36       36           

Flag	Coverage Δ
unittests	90.60% <ø> (ø)

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