Make -o3

Signed-off-by: dragon <dragon7780@hotmail.nl>
defconfig: remove double RCU entry

Signed-off-by: dragon <dragon7780@hotmail.nl>
defconfig: try lz4

Signed-off-by: dragon <dragon7780@hotmail.nl>
defconfig: add CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS

Signed-off-by: dragon <dragon7780@hotmail.nl>
vm: add UKSM