aarch64: defconfig: Cleanup the lahaina_GKI.config

Cleanup the redundant defconfig fragments from lahaina_GKI.config,
that are already enabled in gki_defconfig.

Change-Id: Iee78de5836407506a910a9d257072ab154dde0e1
Signed-off-by: Raghavendra Rao Ananta <rananta@codeaurora.org>