Valid typedef name rule for float/double data type

[misra-c]

Guideline 4.6 is a directive rather than a rule. Section 6.1 of the MISRA-C 2012 document says

A directive is a guideline for which it is not possible to provide the full description necessary to perform a check for compliance.
...
Static analysis tools may be able to assist in checking compliance with directives but different
tools may place widely different interpretations on what constitutes a non-compliance.

As a minimum the name should include the size and in the case of integer types it should include the signedness.

Both UI_FLOAT_32 and FLOAT32 meet the requirements for directive 4.6, BUT a tool is permitted to have a different interpretation on what constitutes a non-compliance.