[PATCH] cpufreq: airoha: add CONFIG_OF dependency

[Arnd Bergmann <arnd@kernel.org>]

From: Arnd Bergmann <arnd@arndb.de>

Compile-testing without CONFIG_OF leads to a harmless build warning:

drivers/cpufreq/airoha-cpufreq.c:109:34: error: 'airoha_cpufreq_match_list' defined but not used [-Werror=unused-const-variable=]
  109 | static const struct of_device_id airoha_cpufreq_match_list[] __initconst = {
      |                                  ^~~~~~~~~~~~~~~~~~~~~~~~~

It would be possible to mark the variable as __maybe_unused to shut up
that warning, but a Kconfig dependency seems more appropriate as this still
allows build testing in allmodconfig and randconfig builds on all
architectures.

Fixes: 84cf9e541ccc ("cpufreq: airoha: Add EN7581 CPUFreq SMCCC driver")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/cpufreq/Kconfig.arm | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/cpufreq/Kconfig.arm b/drivers/cpufreq/Kconfig.arm
index 704e84d00639..9e46960f6a86 100644
--- a/drivers/cpufreq/Kconfig.arm
+++ b/drivers/cpufreq/Kconfig.arm
@@ -18,6 +18,7 @@ config ARM_ALLWINNER_SUN50I_CPUFREQ_NVMEM
 config ARM_AIROHA_SOC_CPUFREQ
 	tristate "Airoha EN7581 SoC CPUFreq support"
 	depends on ARCH_AIROHA || COMPILE_TEST
+	depends on OF
 	select PM_OPP
 	default ARCH_AIROHA
 	help
-- 
2.39.5