config: armv7hl: Compile KGDB serial console into kernel
A serial console is the major communication for ARM devices.
Having CONFIG_KGDB_SERIAL_CONSOLE=m makes it impossible to debug the kernel
at early boot stages.
Signed-off-by: Matwey V. Kornilov <matwey.kornilov@gmail.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>