There is no need for SSDK to support 5.15 anymore since the only user and
possible future ones are on 6.1.
Signed-off-by: Robert Marko <robimarko@gmail.com>
Add kernel 6.1 support to SSDK, it was just a case of adding the kernel
version identification and fixing up get_random_u32.
Signed-off-by: Robert Marko <robimarko@gmail.com>