armv8: ls2080a: Increase env sector size for qspi boot

Increase env sector size from 64kb to 256kb for qspi boot.
Signed-off-by: NSantan Kumar <santan.kumar@nxp.com>
Signed-off-by: NPriyanka Jain <priyanka.jain@nxp.com>
Reviewed-by: NYork Sun <york.sun@nxp.com>

include/configs/ls2080a_common.h

@@ -33,7 +33,7 @@
 #define CONFIG_SYS_TEXT_BASE		0x20100000
 #define CONFIG_ENV_SIZE			0x2000          /* 8KB */
 #define CONFIG_ENV_OFFSET		0x300000        /* 3MB */
-#define CONFIG_ENV_SECT_SIZE		0x10000
+#define CONFIG_ENV_SECT_SIZE		0x40000
 #endif
 
 #define CONFIG_SUPPORT_RAW_INITRD