mpc83xx: add h/w flash protection to board configs

the operating system may leave flash in a h/w locked state after writing.
This allows u-boot to continue to write flash by enabling h/w unlocking
by default.

Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
diff --git a/include/configs/MPC8315ERDB.h b/include/configs/MPC8315ERDB.h
index 5879a82..83f64c6 100644
--- a/include/configs/MPC8315ERDB.h
+++ b/include/configs/MPC8315ERDB.h
@@ -193,6 +193,7 @@
 
 #define CFG_FLASH_BASE		0xFE000000 /* FLASH base address */
 #define CFG_FLASH_SIZE		8 /* FLASH size is 8M */
+#define CFG_FLASH_PROTECTION	1		/* Use h/w Flash protection. */
 
 #define CFG_LBLAWBAR0_PRELIM	CFG_FLASH_BASE /* Window base at flash base */
 #define CFG_LBLAWAR0_PRELIM	0x80000016 /* 8MB window size */