ARM: dts: msm: Remove DT for USB function based streaming

USB streaming mode is enabled by default which also bumps
up usb_core clock to max_nominal. Hence, remove deprecated
'qcom,streaming-func' attribute which was used to enable
streaming mode based on function selected.

Change-Id: Ie2a5194cc795b137a481828d0d91d4b314db434e
Signed-off-by: Manu Gautam <mgautam@codeaurora.org>