arm64: dts: qcom: sc8280xp: fix USB1 PHY RX1 registers

The USB1 SS PHY node had the RX1 register block (0x600) replaced with
RX2 (0xc00).

Fixes: 152d1faf ("arm64: dts: qcom: add SC8280XP platform")
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20220919094454.1574-3-johan+linaro@kernel.org