armv8: ls2080a: Increase load image len for NAND boot

Again the image size increases and the length needs to be adjusted.
Signed-off-by: NYork Sun <york.sun@nxp.com>

include/configs/ls2080a_common.h

@@ -237,7 +237,7 @@ unsigned long long get_qixis_addr(void);
 #endif
 #define CONFIG_SYS_SPL_MALLOC_SIZE	0x00100000
 #define CONFIG_SYS_SPL_MALLOC_START	0x80200000
-#define CONFIG_SYS_MONITOR_LEN		(640 * 1024)
+#define CONFIG_SYS_MONITOR_LEN		(1024 * 1024)
 
 #define CONFIG_SYS_BOOTM_LEN   (64 << 20)      /* Increase max gunzip size */