drm/amdgpu: atomfirmware.h: fix multiple spelling mistakes

drm/amdgpu: atomfirmware.h: fix multiple spelling mistakes

This patch corrects several typographical errors in atomfirmware.h.
The fixes improve readability and maintain consistency in the codebase.
No functional changes are introduced.

Corrected terms include:
- aligment    → alignment
- Offest      → Offset
- defintion   → definition
- swithing    → switching
- calcualted  → calculated
- compability → compatibility
- intenal     → internal
- sequece     → sequence
- indiate     → indicate
- stucture    → structure
- regiser     → register

Signed-off-by: Yugansh Mittal <mittalyugansh1@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>