tpm2_getekcertificate: Provide option -u for certs in NV ram. #1865

Job	Run time
coverage-test	5m 48s
master-tss-build-test (gcc)	5m 4s
build-test (ubuntu-20.04, gcc)	5m 7s
master-tss-build-test (clang)	4m 50s
build-test (ubuntu-20.04, clang)	4m 52s
coverity-test	0s
build-test (fedora-30, gcc)	5m 8s
build-test (fedora-30, clang)	5m 9s
build-test (opensuse-leap, gcc)	5m 8s
build-test (opensuse-leap, clang)	5m 6s
build-test (fedora-32, gcc)	5m 7s
build-test (fedora-32, clang)	5m 6s
build-test (ubuntu-22.04, gcc)	5m 6s
build-test (ubuntu-22.04, clang)	5m 6s
	1h 6m 37s

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