FROMLIST: drivers/clocksource/timer-of: Remove __init markings

This allows timer drivers to be compiled as modules.

Bug: 146868249
Change-Id: I490a0e82ff59022da72b5e2f7e631cfb21533589
Link: https://lore.kernel.org/patchwork/patch/1214447/


Signed-off-by: Saravana Kannan <saravanak@google.com>
Signed-off-by: Baolin Wang <baolin.wang7@gmail.com>
Signed-off-by: Baolin Wang <baolin.wang@unisoc.corp-partner.google.com>
Signed-off-by: Orson Zhai <orson.zhai@unisoc.com>