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>

config/Config-kernel.in

@@ -1107,7 +1107,6 @@ config KERNEL_PAGE_POOL
 config KERNEL_PAGE_POOL_STATS
 	bool "Page pool stats support"
 	depends on KERNEL_PAGE_POOL
-	depends on !LINUX_5_10
 
 #
 # NFS related symbols