Merge changes I4d50d138,Ie16b2e40,I574893fa into integration

* changes:
refactor(tpm): remove TPM code from TF-A
feat(tpm): changes to support TPM lib
feat: add libtpm submodule

feat(tpm): changes to support TPM lib

The build system sets TPM_INTERFACE to FIFO_SPI, but this cannot be
tested by the C preprocessor. So, create new build define
TPM_INTERFACE_FIFO_SPI. Correct th

feat(tpm): changes to support TPM lib

The build system sets TPM_INTERFACE to FIFO_SPI, but this cannot be
tested by the C preprocessor. So, create new build define
TPM_INTERFACE_FIFO_SPI. Correct the #if statements to use it.

Make spi_init() in rpi3_spi.c static.
Pass timer functions as ops structure to TPM.
Remove implicit interface between TPM library and main firmware by
introducing explicit interface to allow firmware to pass structure
of function pointers to setup a timer and check whether it has elapsed.

Update build system for new TPM lib location.
Change #include statements in TPM source and header files to allow
for new directory structure.

Change-Id: Ie16b2e402b963161d7d4f35a187b9bd2765a1faa
Signed-off-by: Matthew Ellis <Matthew.Ellis@arm.com>

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Merge changes from topic "dtpm_poc" into integration

* changes:
feat(docs): update mboot threat model with dTPM
docs(tpm): add design documentation for dTPM
fix(rpi3): expose BL1_RW to BL2 ma

Merge changes from topic "dtpm_poc" into integration

* changes:
feat(docs): update mboot threat model with dTPM
docs(tpm): add design documentation for dTPM
fix(rpi3): expose BL1_RW to BL2 map for mboot
feat(rpi3): add dTPM backed measured boot
feat(tpm): add Infineon SLB9670 GPIO SPI config
feat(tpm): add tpm drivers and framework
feat(io): add generic gpio spi bit-bang driver
feat(rpi3): implement eventlog handoff to BL33
feat(rpi3): implement mboot for rpi3

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feat(tpm): add Infineon SLB9670 GPIO SPI config

add the Infineon Optiga SLB9670 TPM2.0 GPIO SPI
configuration data, as well as chip reset and the
GPIO SPI bitbang driver initialization. This code
su

feat(tpm): add Infineon SLB9670 GPIO SPI config

add the Infineon Optiga SLB9670 TPM2.0 GPIO SPI
configuration data, as well as chip reset and the
GPIO SPI bitbang driver initialization. This code
supports use with the rpi3 platform, with availibility
to add configuration parameters for other platforms

Change-Id: Ibdffb28fa0b3b5a18dff2ba5d4ea305633740763
Signed-off-by: Abhi Singh <abhi.singh@arm.com>

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