kalua: init: zram: list_cpu_idx() rewrite, better portable - not all /proc/cpuinfo have integers there, so we have to count ourselfes
(cherry picked from commit 2b91de1bf7572bc9bc0445d20d4cc5d120d4c686)

Signed-off-by: Andi Bräu <ab@andi95.de>
kalua: init: zram: comment which is on todo-list
(cherry picked from commit 6ecdac5878bf1f7c7c3febb2612c7bd0fe53a82f)

Signed-off-by: Andi Bräu <ab@andi95.de>
kalua: init: zram: finetune log-messages
(cherry picked from commit 871e159b1fa0ca42e501c7be3ee224c6255820ee)

Signed-off-by: Andi Bräu <ab@andi95.de>
kalua: init: zram: supress error-message when uci var is unset, also minor cleanup
(cherry picked from commit 078b53388f08cf752b32e4606bf8c60ce7630847)

Signed-off-by: Andi Bräu <ab@andi95.de>