boards: st: remove .lvgl_buf related linker scripts on STM32

Following introduction of LV_Z_MEMORY_POOL_ZEPHYR_REGION and
LV_Z_VDB_ZEPHYR_REGION, remove the usage of the option
LV_Z_VDB_CUSTOM_SECTION and the related linker scripts for
STM32 boards & shields.

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

Author: Alain Volmat

boards/shields/st_b_lcd40_dsi1_mb1166/boards/stm32h747i_disco_stm32h747xx_m7.defconfig

@@ -11,9 +11,12 @@ config STM32_LTDC_FB_NUM
 config LV_Z_DOUBLE_VDB
 	default y
 
-config LV_Z_VDB_CUSTOM_SECTION
+config LV_Z_VDB_ZEPHYR_REGION
 	default y
 
+config LV_Z_VDB_ZEPHYR_REGION_NAME
+	default "SDRAM2"
+
 config LV_Z_FULL_REFRESH
 	default y
 

boards/shields/st_b_lcd40_dsi1_mb1166/boards/stm32h757i_eval_stm32h757xx_m7.defconfig

@@ -13,9 +13,12 @@ config STM32_LTDC_FB_NUM
 config LV_Z_DOUBLE_VDB
 	default y
 
-config LV_Z_VDB_CUSTOM_SECTION
+config LV_Z_VDB_ZEPHYR_REGION
 	default y
 
+config LV_Z_VDB_ZEPHYR_REGION_NAME
+	default "SDRAM2"
+
 config LV_Z_FULL_REFRESH
 	default y
 

boards/st/stm32h747i_disco/CMakeLists.txt

@@ -31,9 +31,12 @@ config LV_Z_DOUBLE_VDB
 config LV_Z_FULL_REFRESH
 	default y
 
-config LV_Z_VDB_CUSTOM_SECTION
+config LV_Z_VDB_ZEPHYR_REGION
 	default y
 
+config LV_Z_VDB_ZEPHYR_REGION_NAME
+	default "SDRAM2"
+
 config LV_Z_FLUSH_THREAD
 	default y