clocksource/drivers/timer-integrator-ap: Add missing Kconfig dependency on OF

This driver accesses the of_aliases global variable declared in
linux/of.h and defined in drivers/base/of.c. It requires OF support or
will cause a link failure. Add the missing Kconfig dependency.

Closes: https://lore.kernel.org/oe-kbuild-all/202601152233.og6LdeUo-lkp@intel.com/
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://patch.msgid.link/20260116111723.10585-1-bartosz.golaszewski@oss.qualcomm.com

Author: Bartosz Golaszewski

drivers/clocksource/Kconfig

@@ -254,6 +254,7 @@ config KEYSTONE_TIMER
 
 config INTEGRATOR_AP_TIMER
 	bool "Integrator-AP timer driver" if COMPILE_TEST
+	depends on OF
 	select CLKSRC_MMIO
 	help
 	  Enables support for the Integrator-AP timer.