Kernel interface changed with kernel 4.19, it does not accept raw GPIO
numbers any more. Deactivate these drivers on kernel 4.19 for now.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
The build system already defines KERNEL_CROSS which defaults to TARGET_CROSS.
Make use of this variable for kernel makefiles.
Signed-off-by: Karl Vogel <karl.vogel@gmail.com>
