Cache update and added CFG_UNIFY_CACHE

Enabled cache in cpu_init_f() for faster flash to mem allocation. Updated cache handling in start.S. Applied cache invalidate in fec_send() and fec_recv(). Added CFG_UNIFY_CACHE for CF V3 only.

Signed-off-by: TsiChung <tcliew@Goku.(none)>
diff --git a/cpu/mcf532x/start.S b/cpu/mcf532x/start.S
index acd3494..ac44aaa 100644
--- a/cpu/mcf532x/start.S
+++ b/cpu/mcf532x/start.S
@@ -270,8 +270,6 @@
 	movec	%d0, %CACR			/* Invalidate cache */
 	move.l	#(CFG_SDRAM_BASE + 0xc000), %d0	/* Setup cache mask */
 	movec	%d0, %ACR0			/* Enable cache */
-	move.l	#(CFG_CS0_BASE + 0x0000), %d0	/* Setup cache mask */
-	movec	%d0, %ACR1			/* Enable cache */
 
 	move.l	#0x80000200, %d0		/* Setup cache mask */
 	movec	%d0, %CACR			/* Enable cache */
@@ -284,11 +282,11 @@
 
 	.globl	icache_disable
 icache_disable:
-	move.l	#0x00000100, %d0		/* Setup cache mask */
-	movec	%d0, %CACR			/* Enable cache */
+	move.l	#0x01000000, %d0		/* Setup cache mask */
+	movec	%d0, %CACR			/* Disable cache */
 	clr.l	%d0				/* Setup cache mask */
-	movec	%d0, %ACR0			/* Enable cache */
-	movec	%d0, %ACR1			/* Enable cache */
+	movec	%d0, %ACR0
+	movec	%d0, %ACR1
 
 	move.l #(CFG_INIT_RAM_ADDR+CFG_INIT_RAM_END-8), %a1
 	moveq	#0, %d0
@@ -303,7 +301,7 @@
 
 	.globl	icache_invalid
 icache_invalid:
-	move.l	#0x01000000, %d0		/* Setup cache mask */
+	move.l	#0x81000200, %d0		/* Setup cache mask */
 	movec	%d0, %CACR			/* Enable cache */
 	rts