cfi_flash: give default CONFIG_SYS_MAX_FLASH_SECT in flash.h

Give default CONFIG_SYS_MAX_FLASH_SECT in flash.h, so that
the header can be included regardless of the present of flash.
The value 512 is the most used.
Signed-off-by: NThomas Chou <thomas@wytron.com.tw>
Signed-off-by: NStefan Roese <sr@denx.de>

include/flash.h

@@ -8,7 +8,10 @@
 #ifndef _FLASH_H_
 #define _FLASH_H_
 
-#ifndef CONFIG_SYS_NO_FLASH
+#ifndef CONFIG_SYS_MAX_FLASH_SECT
+#define CONFIG_SYS_MAX_FLASH_SECT	512
+#endif
+
 /*-----------------------------------------------------------------------
  * FLASH Info: contains chip specific data, per FLASH bank
  */
@@ -503,6 +506,4 @@ extern flash_info_t *flash_get_info(ulong base);
 #define FLASH_ERASE_TIMEOUT	120000	/* timeout for erasing in ms		*/
 #define FLASH_WRITE_TIMEOUT	500	/* timeout for writes  in ms		*/
 
-#endif /* !CONFIG_SYS_NO_FLASH */
-
 #endif /* _FLASH_H_ */