include: drivers: clock_control: stm32: fix xtpre

Correct DT property to set correct STM32_PLL_XTPRE value.
The driver bindings defined `xtpre` instead of used `xtre`
in the `DT_PROP` macro.
That allows to use F1 PLL clock with division by 2.

Signed-off-by: Georgij Cernysiov <geo.cgv@gmail.com>
diff --git a/include/drivers/clock_control/stm32_clock_control.h b/include/drivers/clock_control/stm32_clock_control.h
index 202faa7..37261b8 100644
--- a/include/drivers/clock_control/stm32_clock_control.h
+++ b/include/drivers/clock_control/stm32_clock_control.h
@@ -86,7 +86,7 @@
 #endif
 
 #if DT_NODE_HAS_COMPAT_STATUS(DT_NODELABEL(pll), st_stm32f1_pll_clock, okay)
-#define STM32_PLL_XTPRE		DT_PROP(DT_NODELABEL(pll), xtre)
+#define STM32_PLL_XTPRE		DT_PROP(DT_NODELABEL(pll), xtpre)
 #define STM32_PLL_MULTIPLIER	DT_PROP(DT_NODELABEL(pll), mul)
 #elif DT_NODE_HAS_COMPAT_STATUS(DT_NODELABEL(pll), st_stm32f0_pll_clock, okay) || \
 	DT_NODE_HAS_COMPAT_STATUS(DT_NODELABEL(pll), st_stm32f100_pll_clock, okay) || \