mfd: qnap-mcu: Convert commas to semicolons in qnap_mcu_exec()

mfd: qnap-mcu: Convert commas to semicolons in qnap_mcu_exec()

Replace comma between expressions with semicolons.

Using a ',' in place of a ';' can have unintended side effects.
Although that is not the case here, it is seems best to use ';'
unless ',' is intended.

Found by inspection.
No functional change intended.
Compile tested only.

Fixes: 998f70d1806b ("mfd: Add base driver for qnap-mcu devices")
Signed-off-by: Chen Ni <nichen@iscas.ac.cn>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Link: https://lore.kernel.org/r/20250310031145.650950-1-nichen@iscas.ac.cn
Signed-off-by: Lee Jones <lee@kernel.org>