SPL: do not use fix value for u-boot size

If an u-boot image is not found, SPL thinks to load a bare
u-boot.bin image with a maximum size of 200KB.
Use CONFIG_SYS_MONITOR_LEN instead.

Signed-off-by: Stefan Roese <stefan.roese@gmail.com>
Signed-off-by: Stefano Babic <sbabic@denx.de>
Signed-off-by: Tom Rini <trini@ti.com>

common/spl/spl.c

@@ -35,6 +35,10 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
+#ifndef CONFIG_SYS_MONITOR_LEN
+#define CONFIG_SYS_MONITOR_LEN	(200 * 1024)
+#endif
+
 u32 *boot_params_ptr = NULL;
 struct spl_image_info spl_image;
 
@@ -86,7 +90,7 @@ void spl_parse_image_header(const struct image_header *header)
 		debug("mkimage signature not found - ih_magic = %x\n",
 			header->ih_magic);
 		/* Let's assume U-Boot will not be more than 200 KB */
-		spl_image.size = 200 * 1024;
+		spl_image.size = CONFIG_SYS_MONITOR_LEN;
 		spl_image.entry_point = CONFIG_SYS_TEXT_BASE;
 		spl_image.load_addr = CONFIG_SYS_TEXT_BASE;
 		spl_image.os = IH_OS_U_BOOT;