defconfig: switch ramdisk path
gpio-keys: POnKey emulator on Vol Up/Down

/sys/kernel/gpio-keys/

echo volup=? > ponkey_emu
echo voldown=? > ponkey_emu

? = 0 / 1

Signed-off-by: cocafe <cocafehj@gmail.com>
defconfig: enable ste modem trace

Some weird issues appeared

This reverts commit 37c5e811fda8f2011e2fed4db17727e6f79b9b35.
defconfig: version tag 6.9 -> 7.0
defconfig: switch to slab memory allocator
mali: maximum preemptive allocate memory 16mb -> 24mb

24mb for a bit more throughput