OPP table name now should start with "opp-table" and OPP entries
shouldn't contain commas and @ signs in accordance to the new schema
requirement.
The same change was done in Linux by commit c6d4a8977598 ("ARM: tegra:
Rename CPU and EMC OPP table device-tree nodes"), commit ffbe853a3f5a
("ARM: dts: sunxi: Fix OPPs node name") or commit b7072cc5704d ("arm64:
dts: qcom: qcs404: Rename CPU and CPR OPP tables").