treewide: cleanup kernel symbol references

We only use 5.15 kernel. So remove all those unnecessary symbols
referencing 5.10 or 5.15 kernel.

Can be found with:
  git grep -E 'LINUX_5_1(0|5)'

Note that we remove the dependency from "sound-soc-chipdip-dac" instead
of removing the complete kernel package. The 5.15 version bump forgot to
delete the "@LINUX_5_10" dependency. The kernel package is still needed
in 5.15 kernel.

Signed-off-by: Nick Hainke <vincent@systemli.org>

package/kernel/linux/modules/video.mk

@@ -226,7 +226,7 @@ define KernelPackage/drm
   TITLE:=Direct Rendering Manager (DRM) support
   HIDDEN:=1
   DEPENDS:=+kmod-dma-buf +kmod-i2c-core +PACKAGE_kmod-backlight:kmod-backlight \
-	+(LINUX_5_15):kmod-fb
+	+kmod-fb
   KCONFIG:=CONFIG_DRM
   FILES:= \
 	$(LINUX_DIR)/drivers/gpu/drm/drm.ko \