ARM: SPEAr: DT: Fix existing DT support

This patch fixes existing DT support for all SPEAr SoC's. This includes:
- Removing few nodes from board files
- Updating DT data of few nodes
- Updating ranges of few busses
- Moving devices to correct parent bus

Signed-off-by: Bhavna Yadav <bhavna.yadav@st.com>
Signed-off-by: Deepak Sikri <deepak.sikri@st.com>
Signed-off-by: Rajeev Kumar <rajeev-dlh.kumar@st.com>
Signed-off-by: Shiraz Hashim <shiraz.hashim@st.com>
Signed-off-by: Vijay Kumar Mishra <vijay.kumar@st.com>
Signed-off-by: Vipin Kumar <vipin.kumar@st.com>
Signed-off-by: Vipul Kumar Samar <vipulkumar.samar@st.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>