clocksource/timer-econet-en751221: Convert comma to semicolon

clocksource/timer-econet-en751221: Convert comma to semicolon

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.

Signed-off-by: Chen Ni <nichen@iscas.ac.cn>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Tested-by: Caleb James DeLisle <cjd@cjdns.fr>
Link: https://lore.kernel.org/r/20250603060450.1310204-1-nichen@iscas.ac.cn