arm64: dts: qcom: msm8992-bullhead: Remove PSCI

Bullhead firmware obviously doesn't support PSCI as it fails to boot
with this definition.

Fixes: 329e16d5 ("arm64: dts: qcom: msm8992: Add PSCI support.")
Signed-off-by: Petr Vorel <petr.vorel@gmail.com>
Link: https://lore.kernel.org/r/20210713185734.380-2-petr.vorel@gmail.comSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

arch/arm64/boot/dts/qcom/msm8992-bullhead-rev-101.dts

 // SPDX-License-Identifier: GPL-2.0-only
 /* Copyright (c) 2015, LGE Inc. All rights reserved.
  * Copyright (c) 2016, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2021, Petr Vorel <petr.vorel@gmail.com>
  */
 
 /dts-v1/;
@@ -17,6 +18,9 @@ / {
 	qcom,board-id = <0xb64 0>;
 	qcom,pmic-id = <0x10009 0x1000A 0x0 0x0>;
 
+	/* Bullhead firmware doesn't support PSCI */
+	/delete-node/ psci;
+
 	aliases {
 		serial0 = &blsp1_uart2;
 	};