Add support for vApplicationFPUSafeIRQHandler

[kar-rahul-aws]

Description

This PR adds support for vApplicationFPUSafeIRQHandler. The application writer needs to name their IRQ handler as:

1. vApplicationIRQHandler if the IRQ handler does not use FPU registers.
2. vApplicationFPUSafeIRQHandler is the IRQ handler uses FPU registers.

When the application uses vApplicationFPUSafeIRQHandler, a default implementation of vApplicationIRQHandler is used which stores FPU registers and then calls vApplicationFPUSafeIRQHandler.

Test Steps

Tested on ARM_CRx_No_GIC Demo with the code snippet

    __asm volatile ( "vmov d8, r0, r1       \n"
                     "vmov d9, r0, r1       \n"
                     "vmov d10, r0, r1      \n"
                     "vmov d11, r0, r1      \n"
                     "vmov d12, r0, r1      \n"
                     "vmov d13, r0, r1      \n"
                     "vmov d14, r0, r1      \n"
                     "vmov d15, r0, r1      \n"
                     ::: "d8", "d9", "d10", "d11", "d12", "d13", "d14", "d15" );

    __asm volatile ( "vmov d0, r0, r1       \n"
                     "vmov d1, r0, r1       \n"
                     "vmov d2, r0, r1       \n"
                     "vmov d3, r0, r1       \n"
                     "vmov d4, r0, r1       \n"
                     "vmov d5, r0, r1       \n"
                     "vmov d6, r0, r1       \n"
                     "vmov d7, r0, r1       \n"
                     ::: "d0", "d1", "d2", "d3", "d4", "d5", "d6", "d7" );

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.

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.31%. Comparing base (17dfd0f) to head (171129a).
Report is 9 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1113   +/-   ##
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  Coverage   92.31%   92.31%           
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  Files           6        6           
  Lines        3226     3228    +2     
  Branches      885      885           
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+ Hits         2978     2980    +2     
  Misses        132      132           
  Partials      116      116           

Flag	Coverage Δ
unittests	92.31% <ø> (+<0.01%)	⬆️

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