Enable mixed build for GKI-based targets. Mixed build works by first
compiling the GKI kernel source tree to generate vmlinux, Image, and
similar artifacts. Then, msm-5.10 kernel tree modules are compiled.
These artifacts are combined to produce the final set of boot images,
vendor_boot images, etc.
Since mixed build means we don't compile a vmlinux, some kernel/build
options around KMI enforcement break. Remove TRIM_NONLISTED_KMI and
KMI_SYMBOL_LIST_STRICT_MODE since they are meaningless in the context of
msm-5.10 since kernel/common generates the KMI.
Change-Id: I02ad171a3b861dfa19043d04be131eae75aec426
Signed-off-by: Elliot Berman <eberman@codeaurora.org>
46effaf7fd