ARM: dts: msm: Rename ipa_loaduc on sm6150

"qcom,ipa-loaduc" property in device tree file
is used to indicate the platform type
to modem on IPA driver init.

So, as per the use case of this, rename
"qcom,ipa-loaduc" to "qcom,ipa-platform-type-msm".

Change-Id: Id5ea7855123240e3f1734a64b92081ef68fe4689
Acked-by: Pooja Kumari <kumarip@qti.qualcomm.com>
Signed-off-by: Mohammed Javid <mjavid@codeaurora.org>