kernel: Cleanup logger setup in kernel files Most of kernel files where declaring os module without providing log level. Because of that default log level was used instead of CONFIG_KERNEL_LOG_LEVEL. Signed-off-by: Krzysztof Chruscinski <krzysztof.chruscinski@nordicsemi.no>

diff --git a/kernel/init.c b/kernel/init.c
index 38dde05..a9744ac 100644
--- a/kernel/init.c
+++ b/kernel/init.c

@@ -35,10 +35,8 @@
 #include <stdbool.h>
 #include <debug/gcov.h>
 #include <kswap.h>
-
-#define LOG_LEVEL CONFIG_KERNEL_LOG_LEVEL
 #include <logging/log.h>
-LOG_MODULE_REGISTER(os);
+LOG_MODULE_REGISTER(os, CONFIG_KERNEL_LOG_LEVEL);
 
 /* boot banner items */
 #if defined(CONFIG_MULTITHREADING) && defined(CONFIG_BOOT_DELAY) \