configs: ax25-ae350: Support cfi flash

Enable cfi flash driver and setup flash
parameters to support parallel nor flash
which type is JS28F00A-M29EWH.

Verification:
Size detection, data read, erase and write are all ok.

Signed-off-by: Rick Chen <rick@andestech.com>
Signed-off-by: Rick Chen <rickchen36@gmail.com>
Cc: Greentime Hu <green.hu@gmail.com>