* guix/build/kconfig.scm: New file.
* Makefile.am: Register it.
* gnu/packages/bootloaders.scm (make-u-boot-package)
(make-u-boot-sunxi64-package): Add DEFCONFIGS and CONFIGS arguments. Remove
dead code.
(u-boot-am335x-boneblack, u-boot-pinebook)
(u-boot-novena,u-boot-rockpro64-rk3399): Simplify packages by using the new
keyword arguments.
Signed-off-by: Maxim Cournoyer <maxim.cournoyer@gmail.com>
Modified-by: Maxim Cournoyer <maxim.cournoyer@gmail.com>