arm64: dts: qcom: sm6115: Fix UFS node

arm64: dts: qcom: sm6115: Fix UFS node

In its current form, UFS did not even probe successfully - it failed
when trying to set XO (ref_clk) to 300 MHz instead of doing so to
the ICE clk. Moreover, the missing reg-names prevented ICE from
working or being discovered at all. Fix both of these issues.

As a sidenote, the log reveals that this SoC uses UFS ICE v3.1.0.

Fixes: 97e563bf5ba1 ("arm64: dts: qcom: sm6115: Add basic soc dtsi")
Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Reviewed-by: Iskren Chernev <me@iskren.info>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221208201401.530555-1-konrad.dybcio@linaro.org