add touchscreen fw upgrade to default driver debugfs
this creates a debugfs interface the user can "echo" a firmware file into:
root@pureos:/home/purism# cd /sys/kernel/debug/edt_ft5x06/
root@pureos:/sys/kernel/debug/edt_ft5x06# echo /home/purism/FT8006P_Reference_C001_P001_V0x02_L0x07_20210107_all.bin > upgrade_bin
root@pureos:/sys/kernel/debug/edt_ft5x06# cat fw_version
2
and removes the driver we had in tree for this. this should be done instead of !659 (closed) if that's ok.
Fixes: #383 (closed)
Edited by Martin Kepplinger