rtc: pcf2127: add missing semicolon after statement

Replace comma with semicolon at the end of the statement when setting
config.max_register.

Fixes: fd28ceb4 ("rtc: pcf2127: add variant-specific configuration structure")
Cc: stable@vger.kernel.org
Cc: Elena Popa <elena.popa@nxp.com>
Signed-off-by: Hugo Villeneuve <hvilleneuve@dimonoff.com>
Link: https://lore.kernel.org/r/20250529202923.1552560-1-hugo@hugovil.com


Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>