bluetooth: restore default of 'enable_native_hfp_hf'
Default value of 'enable_native_hfp_hf' seems to be inadvertently changed from "when using only native backend" to "always" in commit fec9eb17 ("bluetooth: disable HSP HS profile by default"). This is due to a second default overwriting the first default set above (presumably because it's in a different place from other arguments' defaults).
Remove the second default and move the first default to its place, in line with other arguments' defaults.