px4 fmu-v6u:Add remaining SRAM4 & DTCM to heap

boards/px4/fmu-v6u/nuttx-config/nsh/defconfig

@@ -92,6 +92,7 @@ CONFIG_MMCSD=y
 CONFIG_MMCSD_SDIO=y
 CONFIG_MMCSD_SDIOWAIT_WRCOMPLETE=y
 CONFIG_MM_IOB=y
+CONFIG_MM_REGIONS=4
 CONFIG_MTD=y
 CONFIG_MTD_BYTE_WRITE=y
 CONFIG_MTD_PARTITION=y
@@ -160,8 +161,6 @@ CONFIG_STM32H7_BKPSRAM=y
 CONFIG_STM32H7_DMA1=y
 CONFIG_STM32H7_DMA2=y
 CONFIG_STM32H7_DMACAPABLE=y
-CONFIG_STM32H7_DTCMEXCLUDE=y
-CONFIG_STM32H7_DTCM_PROCFS=y
 CONFIG_STM32H7_FLASH_OVERRIDE_I=y
 CONFIG_STM32H7_FLOWCONTROL_BROKEN=y
 CONFIG_STM32H7_I2C1=y

boards/px4/fmu-v6u/nuttx-config/scripts/script.ld

@@ -200,10 +200,14 @@ SECTIONS
 
 	/* Emit the the D3 power domain section for locating BDMA data */
 
-	.sram4 (NOLOAD) :
+	.sram4_reserve (NOLOAD) :
 	{
+		*(.sram4)
+		. = ALIGN(4);
+		_sram4_heap_start = ABSOLUTE(.);
 	} > sram4
 
+
 	/* Stabs debugging sections. */
 	.stab 0 : { *(.stab) }
 	.stabstr 0 : { *(.stabstr) }