selftests/tpm2: increase timeout for kselftests

Due to CreatePrimary commands which need to create RSA keys of
increasing size, the timeout value need to be raised, as well.
Default is 45s.

Fixed git am white space warns:
Shuah Khan <[e-mail]>

Signed-off-by: Johannes Holland <[e-mail]>
Signed-off-by: Stefan Mahnke-Hartmann <[e-mail]>
Signed-off-by: Shuah Khan <[e-mail]>

tools/testing/selftests/tpm2/settings

···
+timeout=600