display: stm32: ltdc: remove PLLSAI configuration

Now that PLLSAI can be configured via the device-tree, remove the
SOC specific PLLSAI configuration from the LTDC driver.

Signed-off-by: Alain Volmat <[email protected]>

Author: Alain Volmat

drivers/display/display_stm32_ltdc.c

@@ -396,32 +396,6 @@ static int stm32_ltdc_init(const struct device *dev)
 		}
 	}
 
-#if defined(CONFIG_SOC_SERIES_STM32F4X)
-	LL_RCC_PLLSAI_Disable();
-	LL_RCC_PLLSAI_ConfigDomain_LTDC(LL_RCC_PLLSOURCE_HSE,
-					LL_RCC_PLLSAIM_DIV_8,
-					192,
-					LL_RCC_PLLSAIR_DIV_4,
-					LL_RCC_PLLSAIDIVR_DIV_8);
-
-	LL_RCC_PLLSAI_Enable();
-	while (LL_RCC_PLLSAI_IsReady() != 1) {
-	}
-#endif
-
-#if defined(CONFIG_SOC_SERIES_STM32F7X)
-	LL_RCC_PLLSAI_Disable();
-	LL_RCC_PLLSAI_ConfigDomain_LTDC(LL_RCC_PLLSOURCE_HSE,
-					LL_RCC_PLLM_DIV_25,
-					384,
-					LL_RCC_PLLSAIR_DIV_5,
-					LL_RCC_PLLSAIDIVR_DIV_8);
-
-	LL_RCC_PLLSAI_Enable();
-	while (LL_RCC_PLLSAI_IsReady() != 1) {
-	}
-#endif
-
 	/* reset LTDC peripheral */
 	(void)reset_line_toggle_dt(&config->reset);