defconfig: Add initial defconfig fragments for Lahaina

Add initial defconfig fragments, such as lahaina_GKI.config,
lahaina_QGKI.config, and lahaina_debug.config, for the
Lahaina platform.

Change-Id: I019a941d5bae5e043feb2e4d43f450332b795881
Signed-off-by: Raghavendra Rao Ananta <rananta@codeaurora.org>