librem5-devkit: config: increase the kernel log buffer to 256KB
requested to merge martin.kepplinger/linux-next:i/imx8-5.3-rc1-devkit/logbuf_increase into imx8-linux-next-devkit
Our boot process doesn't fit into the kernel log buffer. Increse the buffer from 128KB to 256KB and support "dmesg" to see all the logs, starting with
[ 0.000000] Booting Linux on physical CPU 0x0000000000 [0x410fd034]
Signed-off-by: Martin Kepplinger martin.kepplinger@puri.sm