Staging: rts5208: Use dev_dbg and print_hex_dump_bytes to dump memory

Use dev_dbg with %*ph format specifier and print_hex_dump_bytes to dump memory
instead of relying on custom macro.

Signed-off-by: Fabio Falzoi <fabio.falzoi84@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>