As the core now deals with the lack of a resource table, remove the
dangling custom dummy implementations of find_rsc_table from drivers.
Reviewed-By: NLoic Pallardy <loic.pallardy@st.com>
Tested-By: NLoic Pallardy <loic.pallardy@st.com>
Signed-off-by: NBjorn Andersson <bjorn.andersson@linaro.org>