configs: vf610: increase maximum size and enforce correct limit

On Vybrid SoCs U-Boot gets loaded into GFX SRAM which is 512KiB.
Currently 32KiB is reserved for the IMX header. However, this is
not reflected in the size limit. In v2017.11-rc2 the actual size
limit (512KiB-32KiB) has been reached for Colibri VF61, which
lead to a successful build of U-Boot but not a working binary.

The IMX header is much smaller than 32KiB, typically around 1KiB.
Decrease the reserved size to 4KiB and specify the correct U-Boot
size limit. Apply this new base address and limit for all Vybrid
based boards.
Signed-off-by: NStefan Agner <stefan.agner@toradex.com>

include/configs/colibri_vf.h

@@ -75,8 +75,8 @@
 #define CONFIG_FDTADDR			0x84000000
 
 /* We boot from the gfxRAM area of the OCRAM. */
-#define CONFIG_SYS_TEXT_BASE		0x3f408000
-#define CONFIG_BOARD_SIZE_LIMIT		524288
+#define CONFIG_SYS_TEXT_BASE		0x3f401000
+#define CONFIG_BOARD_SIZE_LIMIT		520192
 
 #define SD_BOOTCMD \
 	"sdargs=root=/dev/mmcblk0p2 rw rootwait\0"	\

include/configs/pcm052.h

@@ -89,8 +89,8 @@
 #define CONFIG_LOADADDR			0x82000000
 
 /* We boot from the gfxRAM area of the OCRAM. */
-#define CONFIG_SYS_TEXT_BASE		0x3f408000
-#define CONFIG_BOARD_SIZE_LIMIT		524288
+#define CONFIG_SYS_TEXT_BASE		0x3f401000
+#define CONFIG_BOARD_SIZE_LIMIT		520192
 
 /* if no target-specific extra environment settings were defined by the
    target, define an empty one */

include/configs/vf610twr.h

@@ -79,8 +79,8 @@
 #define CONFIG_SYS_LOAD_ADDR		0x82000000
 
 /* We boot from the gfxRAM area of the OCRAM. */
-#define CONFIG_SYS_TEXT_BASE		0x3f408000
-#define CONFIG_BOARD_SIZE_LIMIT		524288
+#define CONFIG_SYS_TEXT_BASE		0x3f401000
+#define CONFIG_BOARD_SIZE_LIMIT		520192
 
 /*
  * We do have 128MB of memory on the Vybrid Tower board. Leave the last