MU: Remove unneeded cast in TPM2B_UNMARSHAL. #2255

Job	Run time
scanbuild	6m 39s
scanbuild	6m 39s
coverity-test	0s
coverity-test	0s
build-test (ubuntu-20.04, gcc)	4m 30s
build-test (ubuntu-20.04, gcc)	4m 30s
build-test (ubuntu-20.04, clang)	4m 22s
build-test (ubuntu-20.04, clang)	4m 22s
build-test (fedora-32, gcc)	4m 38s
build-test (fedora-32, gcc)	4m 38s
test-coverage	5m 12s
test-coverage	5m 12s
test-fuzz	2m 36s
test-fuzz	2m 36s
build-test (fedora-32, clang)	4m 54s
build-test (fedora-32, clang)	4m 54s
test-mbedtls (ubuntu-20.04)	2m 58s
test-mbedtls (ubuntu-20.04)	2m 58s
build-test (opensuse-leap, gcc)	4m 30s
build-test (opensuse-leap, gcc)	4m 30s
test-mbedtls (ubuntu-22.04-mbedtls-3.1)	2m 42s
test-mbedtls (ubuntu-22.04-mbedtls-3.1)	2m 40s
build-test (opensuse-leap, clang)	4m 37s
build-test (opensuse-leap, clang)	4m 37s
test-no-crypto-build	1m 19s
test-no-crypto-build	1m 19s
build-test (ubuntu-22.04, gcc)	4m 34s
build-test (ubuntu-22.04, gcc)	4m 34s
test-tcti-config	14m 22s
test-tcti-config	14m 22s
build-test (ubuntu-22.04, clang)	4m 35s
build-test (ubuntu-22.04, clang)	4m 35s
build-test (alpine-3.15, gcc)	3m 57s
build-test (alpine-3.15, gcc)	3m 57s
build-test (alpine-3.15, clang)	4m 43s
build-test (alpine-3.15, clang)	4m 43s
	2h 42m 14s

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