Fix MISRA issue

[moninom1]

Description

Fix following MISRA issues :

1. MISRA Rule 8_5 : Symbol "FreeRTOS_inet_ntop6" is declared more than once.
2. MISRA Rule 8_9 : Symbol "FreeRTOS_in6addr_loopback" should be defined at block scope.
3. MISRA Rule 8_8 : missing static storage modifier for "prvCloseDHCPSocket" which has internal linkage.
4. MISRA Rule 9_1 : Using uninitialized value "xRemoteIP.xIs_IPv6" when calling "pxTCPSocketLookup".
5. MISRA Rule 9_1 : Using uninitialized value "pxAddress->sin_family" when calling "prvSocketBindAdd".
6. MISRA Rule 11_3 : A cast shall not be performed between two pointer of different object type.
7. MISRA Rule 12_1 : Missing parentheses on sub-expression of the operator.
8. MISRA Rule 14.4 : The condition expression 0 does not have an essentially boolean type
9. MISRA Rule 15_6 : The body of the "then" branch of the "if" statement is not a compound statement.
10. MISRA Rule 17_7 : The return value of a non-void function "memset" is unused.
11. MISRA Rule 20_5 : Using "#undef".
12. MISRA Rule 20_10 : Use of "#" or "##" preprocessor operator.
13. MISRA Rule 21_1 : Defining or undefining a reserved name "_static", which is an identifier or macro name beginning with an underscore.
14. MISRA Rule 21_15 : Calling function "memcmp" with incompatible types "void " and "uint8_t const ()[6]".

Test Steps

Coverity Test cases with cov-analysis-linux64-2023.6.1 version.

Checklist:

• I have tested my changes. No regression in existing tests.
• I have modified and/or added unit-tests to cover the code changes in this Pull Request.

Related Issue

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[moninom1]

/bot run formatting

[htibosch]

Thank you for these MISRA changes. I only had 3 minor remarks. Most importantly: shall we remove FreeRTOS_flush_logging()?

[htibosch]

@moninom1, I think nobody will miss the function FreeRTOS_flush_logging(). But it doesn't bother neither.

Thanks for this PR

[AniruddhaKanhere]

Approved with a minor comment