drivers: clock control of the stm32h7 skips pll1 re-init

Skip the PLL1 init if it is already running, this will avoid disabling
the PLL when running after a jump from mcuboot

Signed-off-by: Francois Ramu <[email protected]>

Author: FRASTM

drivers/clock_control/clock_stm32_ll_h7.c

@@ -666,6 +666,12 @@ __unused
 static int set_up_plls(void)
 {
 #if defined(STM32_PLL_ENABLED) || defined(STM32_PLL2_ENABLED) || defined(STM32_PLL3_ENABLED)
+
+	/* Skip if PLL1 is already configured */
+	if (LL_RCC_PLL1_IsReady()) {
+		return 0;
+	}
+
 	int r;
 	uint32_t vco_input_range;
 	uint32_t vco_output_range;