ANDROID: GKI: remove CONFIG_RANDOM_TRUST_CPU=y from gki_defconfig

In commit eeadd7db ("random: credit cpu and bootloader seeds by
default") this option is now the default, so no need to explicitly set
it.  Fix the build breakage by removing it from the gki_defconfig files.

Fixes: eeadd7db ("random: credit cpu and bootloader seeds by default")
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: Ibb54fc5c34cf249a8acfa45a373d587fbe2c393a