fix(PeriphDrivers): Update RTC SEC and SSEC register size

[ozersa]

Description

RTC SEC and SSEC register size is 32bit and 12bits This value is set to 8bits for MAX32670, MAX32660, MAX32672. This commit set register size to the correct values.

Checklist Before Requesting Review

• [X] PR Title follows correct guidelines.
• [X] Description of changes and all other relevant information.
• [ ] (Optional) Link any related GitHub issues using a keyword
• [ ] (Optional) Provide info on any relevant functional testing/validation. For API changes or significant features, this is not optional.

Links: https://www.analog.com/media/en/technical-documentation/user-guides/max32670max32671-user-guide.pdf https://www.analog.com/media/en/technical-documentation/user-guides/max32672-user-guide.pdf https://www.analog.com/media/en/technical-documentation/user-guides/max32660-user-guide.pdf

Register size as per of UGs

[Jake-Carter]

@sihyung-maxim do we need to run the register SVD workflow for this?

[sihyung-maxim]

/generate-register-files

[sihyung-maxim]

Our BTM-CI is under maintenance, and the workspace is outdated. Will have to fix next week.