Getting "'+fp' is not a recognized feature for this target (ignoring feature)" on newest nightly

[andre-richter]

As of today, when compiling for my custom aarch64 target, I get the following error spews that were not there previously:

Compiling volatile-register v0.2.0
'+fp' is not a recognized feature for this target (ignoring feature)
'+fp' is not a recognized feature for this target (ignoring feature)

Example project here: https://github.com/andre-richter/rust-raspi3-tutorial/tree/master/05_uart0

I am unsure where this is injected. If I try to explicitly turn it off, I get the same error spew, so this feature seems to not exist at all:

Compiling volatile-register v0.2.0
'-fp' is not a recognized feature for this target (ignoring feature)
'-fp' is not a recognized feature for this target (ignoring feature)
'+fp' is not a recognized feature for this target (ignoring feature)