kselftest/arm64: Add a TODO list for floating point tests

Write down some ideas for additional coverage for floating point in case
someone feels inspired to look into them.

Signed-off-by: Mark Brown <[email protected]>
Reviewed-by: Dave Martin <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Catalin Marinas <[email protected]>

Author: broonie

tools/testing/selftests/arm64/fp/TODO

@@ -0,0 +1,4 @@
+- Test unsupported values in the ABIs.
+- More coverage for ptrace (eg, vector length conversions).
+- Coverage for signals.
+- Test PR_SVE_VL_INHERITY after a double fork.