ANDROID: remove CONFIG_HW_RANDOM_CAVIUM from arm64 gki_defconfig

This is not needed to be specified in the gki_defconfig file anymore as
the dependancies are properly fixed up in 5.10.110

Fixes: 19693838 ("hwrng: cavium - HW_RANDOM_CAVIUM should depend on ARCH_THUNDER")
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I4affa0465e47119df2e83b78aec2c50ba25ed926