defconfig: lahaina: Fix INTERCONNECT_TEST being disabled for QGKI

CONFIG_INTERCONNECT_TEST should be enabled in all config variants. The
interconnect-test debugfs files are required for debugging and
performance testing. It's set to CONFIG_INTERCONNECT_TEST=m in
lahaina_GKI.config, which should normally enable it for all variants.
But it's being unset in the lahaina_QGKI.config fragment. Remove this
override.

Change-Id: Idb15044902cf804f1b4c27029b0f40335adc42ac
Signed-off-by: Mike Tipton <mdtipton@codeaurora.org>