kernel: kmod-backlight-pwm/kmod-hwmon-pwmfan: Depend on PWM_SUPPORT

These drivers depend on the kernel option CONFIG_PWM, only add them to
OpenWrt for targets which have PWM support.

Link: https://github.com/openwrt/openwrt/pull/19480
Signed-off-by: Hauke Mehrtens <[email protected]>

package/kernel/linux/modules/hwmon.mk

@@ -529,7 +529,7 @@ define KernelPackage/hwmon-pwmfan
   KCONFIG:=CONFIG_SENSORS_PWM_FAN
   FILES:=$(LINUX_DIR)/drivers/hwmon/pwm-fan.ko
   AUTOLOAD:=$(call AutoLoad,60,pwm-fan)
-  $(call AddDepends/hwmon, +PACKAGE_kmod-thermal:kmod-thermal)
+  $(call AddDepends/hwmon,@PWM_SUPPORT +PACKAGE_kmod-thermal:kmod-thermal)
 endef
 
 define KernelPackage/hwmon-pwmfan/description

package/kernel/linux/modules/video.mk

@@ -86,7 +86,7 @@ $(eval $(call KernelPackage,backlight))
 define KernelPackage/backlight-pwm
 	SUBMENU:=$(VIDEO_MENU)
 	TITLE:=PWM Backlight support
-	DEPENDS:=+kmod-backlight
+	DEPENDS:=@PWM_SUPPORT +kmod-backlight
 	KCONFIG:=CONFIG_BACKLIGHT_PWM
 	FILES:=$(LINUX_DIR)/drivers/video/backlight/pwm_bl.ko
 	AUTOLOAD:=$(call AutoProbe,video pwm_bl)