mips: octeon: octeon_common.h: Increase CONFIG_SYS_BOOTM_LEN

Increase CONFIG_SYS_BOOTM_LEN to 64MiB for Linux kernel booting.

Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/include/configs/octeon_common.h b/include/configs/octeon_common.h
index 541b818..109ef40 100644
--- a/include/configs/octeon_common.h
+++ b/include/configs/octeon_common.h
@@ -21,4 +21,6 @@
 
 #define CONFIG_SYS_LOAD_ADDR		(CONFIG_SYS_SDRAM_BASE + (1 << 20))
 
+#define CONFIG_SYS_BOOTM_LEN		(64 << 20)	/* 64M */
+
 #endif /* __OCTEON_COMMON_H__ */