staging: pi433: print rf69 debug message more detail

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>