Revert "riscv: dts: jh7110: Enable PLL node in SPL"

This patch breaks speed SD function on Milk-V Mars CM Lite (DFRobot mini router carrier).
Revert this commit for now.

Link: https://lore.kernel.org/u-boot/ZpZSmdrst4z_Q4JQ@swlinux02/T/#mbcd32d430fe58a1dd8161c9f3cc073052501b701

This reverts commit e6b7aeef3df206b9f2a47e715d643b735d18ae73.

Reported-by: E Shattow <lucent@gmail.com>
Signed-off-by: Leo Yu-Chi Liang <ycliang@andestech.com>
diff --git a/arch/riscv/dts/jh7110-u-boot.dtsi b/arch/riscv/dts/jh7110-u-boot.dtsi
index c09d5c9..2f560e7 100644
--- a/arch/riscv/dts/jh7110-u-boot.dtsi
+++ b/arch/riscv/dts/jh7110-u-boot.dtsi
@@ -93,10 +93,6 @@
 	bootph-pre-ram;
 };
 
-&pllclk {
-	bootph-pre-ram;
-};
-
 &S7_0 {
 	status = "okay";
 };