Disable CONFIG_BPF_PRELOAD for Arch Linux

Due to buildsystem limitations, we have previously disabled
CONFIG_DEBUG_INFO. This however, causes CONFIG_DEBUG_INFO_BTF to be
disabled, which in turn causes some warnings at boot when built with
CONFIG_BPF_PRELOAD. So let's also disable CONFIG_BPF_PRELOAD.

pkg/arch/kernel/arch.config

@@ -4,6 +4,12 @@
 
 # CONFIG_DEBUG_INFO is not set
 
+##
+## Prevent BPF stuff from comlaining during boot because we have debug info disabled
+##
+
+# CONFIG_BPF_PRELOAD is not set
+
 ##
 ## Disable atomisp ov5693 (in staging)
 ##