powerpc: mpc85xx: Use symbolic names for cache control bits

We should use the symbolic names for the cache control bits.

Signed-off-by: Mark Marshall <Mark.Marshall@omicron.at>
Reviewed-by: Thomas Graziadei <thomas.graziadei@omicronenergy.com>
Reviewed-by: York Sun <york.sun@nxp.com>

arch/powerpc/cpu/mpc85xx/start.S

@@ -1373,8 +1373,8 @@ icache_enable:
 	mtlr	r8
 	isync
 	mfspr	r4,L1CSR1
-	ori	r4,r4,0x0001
-	oris	r4,r4,0x0001
+	ori	r4,r4,(L1CSR1_CPE | L1CSR1_ICE)@l
+	oris	r4,r4,(L1CSR1_CPE | L1CSR1_ICE)@h
 	mtspr	L1CSR1,r4
 	isync
 	blr
@@ -1402,8 +1402,8 @@ dcache_enable:
 	mtlr	r8
 	isync
 	mfspr	r0,L1CSR0
-	ori	r0,r0,0x0001
-	oris	r0,r0,0x0001
+	ori	r0,r0,(L1CSR0_CPE |  L1CSR0_DCE)@l
+	oris	r0,r0,(L1CSR0_CPE |  L1CSR0_DCE)@h
 	msync
 	isync
 	mtspr	L1CSR0,r0