busybox: reorder nandwrite options

p and o were conflicting, so -p was ignored, causing
an error to be reported when padding was required
linux-etxx00: do not install uncompressed kernel image

save a bit of ipk size and ram (/tmp) during the update
rtl8192cu: update to 3.4.4
Merge remote-tracking branch 'openpli3/master' into HEAD