Handle debug level by libs in easy_soc_libs
LIBWIFI_DEBUG_LEVEL env variable is created and can be set/get by the ubus call. All libs in easy_soc_libs have been updated with new functions which are printed based on its level.
Debug_level is implemented with the following values (the same as the linux kernel's log level): ERR = 3 WARN = 4 INFO = 6 DBG = 7
@janusz @Marek @bartlomiej.grzeskowiak Please review
Signed-off-by: Grzegorz Sluja grzegorz.sluja@iopsys.eu