arm64: dts: qcom: ipq6018: enable USB2 support

Signed-off-by: Kathiravan T <kathirav@codeaurora.org>
[baruch: adjust regs address/size; drop binding updates;
 drop unsupported quirk properties]
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Link: https://lore.kernel.org/r/59a0d43f34b69406cd320f16edc4e7fabe022bfd.1611756920.git.baruch@tkos.co.il
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>