When pi433 failed for rf69 configuration, Debug message should help for finding which value is incorrect. But it's hard to know because it just prints "illegal value". This patch make print message more detail. Signed-off-by: Sidong Yang <realwakka@gmail.com> Link: https://lore.kernel.org/r/20211107105947.21928-1-realwakka@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>