staging: pi433: remove register debug dev_dbg stmts using DEBUG_VALUES

Which the recent addition of the debugfs dentry (regs), users can now
obtain rf69 register values without having to tweak constants
(DEBUG_VALUES) and recompile the pi433 module source code in order to
see those values.

This patch removes code blocks made obsolete by debugfs regs file.

Signed-off-by: Paulo Miguel Almeida <paulo.miguel.almeida.rodenas@gmail.com>
Link: https://lore.kernel.org/r/Yf9ivRB5qpmA5rY2@mail.google.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>