tree e3690cb00c6df02edd3db17f8f655b1eac9ec985
parent a9289af71fbae122acda61f3f9b0d747996b22ce
author Aaron Kling <webgeek1234@gmail.com> 1703105085 -0600
committer Tim Zimmermann <tim@linux4.de> 1722658297 +0200
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kernel: Support kernel modules via kbuild

TARGET_EXTERNAL_KERNEL_MODULES variable is used for the list of modules,
same as the existing functionality, but is invoked if ':kbuild' is
appended to a module name

Existing external module build calls make in the module directory, which
is a standalone module build. The module makefile may chain to kbuild,
but that depends on the module. This addition invokes the kernel build
system, passing the module directory via the M= param, which is the
kernel standard for building out of tree modules.

Change-Id: I38a582952f79f7155cdbf8a5975cf23074bbdab0