fix: ov5640 framesize validation to check FRAMESIZE_5MP

[Wolfleader101]

Change error logging from error to warning for invalid framesize and set framesize to FRAMESIZE_5MP if it exceeds the limit.

Description

OV5640 Sensors actually supporty up to 5MP (2592x1944) - Currently the code limits it FRAMESIZE_QSXGA, // 2560x1920

This change is same as the code in mega_ccm.c

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Checklist

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• 🚨 This PR does not introduce breaking changes.
• All CI checks (GH Actions) pass.
• Documentation is updated as needed.
• Tests are updated or added as necessary.
• Code is well-commented, especially in complex areas.
• Git history is clean — commits are squashed to the minimum necessary.