powerpc/mpc85xx:Fix README to show correct flash memory map

Due to increased size of u-boot, FMAN ucode start address has been shifted
by 256KB causing a overlap with rootfs start address.

Update rootfs start address to reflect correct memory map.

Also fix minor typo in README

Signed-off-by: Prabhakar Kushwaha <prabhakar@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
diff --git a/doc/README.b4860qds b/doc/README.b4860qds
index f8a79db..3da77d9 100644
--- a/doc/README.b4860qds
+++ b/doc/README.b4860qds
@@ -230,14 +230,14 @@
 0xEFF40000	0xEFFFFFFF	u-boot (current bank)		768KB
 0xEFF20000	0xEFF3FFFF	u-boot env (current bank)	128KB
 0xEFF00000	0xEFF1FFFF	FMAN Ucode (current bank)	128KB
-0xEF300000	0xEFF3FFFF	rootfs (alternate bank)		12MB + 256KB
+0xEF300000	0xEFEFFFFF	rootfs (alternate bank)		12MB
 0xEE800000	0xEE8FFFFF	device tree (alternate bank)	1MB
 0xEE020000	0xEE6FFFFF	Linux.uImage (alternate bank)	6MB+896KB
 0xEE000000	0xEE01FFFF	RCW (alternate bank)		128KB
 0xEDF40000	0xEDFFFFFF	u-boot (alternate bank)		768KB
 0xEDF20000	0xEDF3FFFF	u-boot env (alternate bank)	128KB
 0xEDF00000	0xEDF1FFFF	FMAN ucode (alternate bank)	128KB
-0xED300000	0xEDF3FFFF	rootfs (current bank)		12MB+256MB
+0xED300000	0xEDEFFFFF	rootfs (current bank)		12MB
 0xEC800000	0xEC8FFFFF	device tree (current bank)	1MB
 0xEC020000	0xEC6FFFFF	Linux.uImage (current bank)	6MB+896KB
 0xEC000000	0xEC01FFFF	RCW (current bank)		128KB