Revert "arm64: qcom: ipq6018: add usb3 DT description"

This reverts commit 9da2c3f7.

It is also coming in through the qcom tree, but it is a different
version there for some reason.

Reverting it in the USB tree on the request of Bjorn.

Link: https://lore.kernel.org/r/YUnaJolAAZmhs4kU@ripper


Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Kathiravan T <kathirav@codeaurora.org>
Cc: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>