staging: pi433: pi433_if.c fix codestyle on two long lines

This patch fixes the following checkpatch.pl warning:

WARNING: line over 80 characters
#1233: FILE: pi433_if.c:1233:
+               unregister_chrdev(MAJOR(pi433_dev), pi433_spi_driver.driver.name);

WARNING: line over 80 characters
#1240: FILE: pi433_if.c:1240:
+               unregister_chrdev(MAJOR(pi433_dev), pi433_spi_driver.driver.name);

Signed-off-by: Oliver Graute <oliver.graute@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>