rtc: rx8010: remove unnecessary brackets

Remove brackets wherever they guard a single line.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20200914154601.32245-4-brgl@bgdev.pl