TCTI: Add generic platform independent SPI TCTI module (continue from #1862)

[wxleong]

This is to revive the dormant PR (https://github.com/tpm2-software/tpm2-tss/pull/1862). The base commit is taken from https://github.com/jpxd/tpm2-tss/commit/a2c32757d6fdda82d0d8d663f16a2b4d3665550c with the additional changes listed below:

• Implement wait state handling. Implemented Variant 1: The TSS2_TCTI_SPI_HELPER_PLATFORM struct remains as it is, but we allow to disable the wait-state handling by passing NULL for the spi_acquire and spi_release functions.

• Bug fix, do not treat active locality as an error

• Rename tcti-spi to tcti-spi-helper

[wxleong]

Unit test is now implemented in the force-pushed fbafc1c

[wxleong]

Unit test now covers both with and without wait-state scenarios in f9eadea

[wxleong]

Following fixed in 33d0cbc:

• MAXLOGLEVEL=none induced error
• Indentation

[codecov[bot]]

Codecov Report

Merging #2397 (14b44f9) into master (cdeba44) will decrease coverage by 0.31%. The diff coverage is 38.90%.

@@            Coverage Diff             @@
##           master    #2397      +/-   ##
==========================================
- Coverage   83.62%   83.30%   -0.32%     
==========================================
  Files         351      352       +1     
  Lines       37914    38249     +335     
==========================================
+ Hits        31705    31864     +159     
- Misses       6209     6385     +176     

Impacted Files	Coverage Δ
src/tss2-tcti/tcti-spi-helper.c	38.90% <38.90%> (ø)
src/tss2-esys/esys_tr.c	88.71% <0.00%> (-0.28%)	:arrow_down:
src/tss2-fapi/ifapi_helpers.c	85.06% <0.00%> (-0.18%)	:arrow_down:
src/tss2-fapi/ifapi_policy_json_deserialize.c	84.77% <0.00%> (-0.16%)	:arrow_down:
src/tss2-fapi/ifapi_policy_json_serialize.c	87.87% <0.00%> (-0.02%)	:arrow_down:
src/tss2-tcti/tcti-swtpm.c	89.76% <0.00%> (ø)
src/tss2-esys/api/Esys_Commit.c	93.93% <0.00%> (ø)
src/tss2-esys/api/Esys_PCR_Read.c	92.85% <0.00%> (ø)
src/tss2-esys/api/Esys_EC_Ephemeral.c	93.58% <0.00%> (ø)
src/tss2-esys/api/Esys_PCR_Allocate.c	96.10% <0.00%> (ø)
... and 5 more

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