struct rtc_device is allocated twice in probe(), once with
devm_kzalloc(), and then with devm_rtc_allocate_device().

The allocation with devm_kzalloc() is lost and superfluous.

Fixes: 9f67c1e6 ("rtc: tps6594: Add driver for TPS6594 RTC")
Signed-off-by: Richard Genoud <richard.genoud@bootlin.com>
Link: https://lore.kernel.org/r/20240618141851.1810000-2-richard.genoud@bootlin.comSigned-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>