Revert "ARM: dts: am335x-boneblack: Enable 1GHz OPP for cpu"

This reverts commit c36e6ec9.

The original commit updated the cpufreq operating points tables for
am335x-boneblack but was merged before the driver making use of the node
was merged, which breaks the existing cpufreq implementation on the
system, so revert the patch until the ti-cpufreq driver is merged.
Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/am335x-boneblack.dts

@@ -33,17 +33,6 @@ &mmc2 {
 	status = "okay";
 };
 
-&cpu0_opp_table {
-	/*
-	 * All PG 2.0 silicon may not support 1GHz but some of the early
-	 * BeagleBone Blacks have PG 2.0 silicon which is guaranteed
-	 * to support 1GHz OPP so enable it for PG 2.0 on this board.
-	 */
-	oppnitro@1000000000 {
-		opp-supported-hw = <0x06 0x0100>;
-	};
-};
-
 &am33xx_pinmux {
 	nxp_hdmi_bonelt_pins: nxp_hdmi_bonelt_pins {
 		pinctrl-single,pins = <