arm: mvebu: Don't disable cache at startup on Armada XP at all

This patch leaces the cache configuration untouched for the AXP in the
setup done by the BootROM. Resulting in the cache still being enabled
at the startup of U-Boot. This leads to a slightly faster boot to the
U-Boot prompt (or Linux of course).

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Luka Perkov <luka.perkov@sartura.hr>

arch/arm/mach-mvebu/cpu.c

@@ -246,13 +246,15 @@ int arch_cpu_init(void)
 	 * in the macros / defines in the U-Boot header (soc.h).
 	 */
 
-	/*
-	 * To fully release / unlock this area from cache, we need
-	 * to flush all caches and disable the L2 cache.
-	 */
-	icache_disable();
-	dcache_disable();
-	clrbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN);
+	if (mvebu_soc_family() == MVEBU_SOC_A38X) {
+		/*
+		 * To fully release / unlock this area from cache, we need
+		 * to flush all caches and disable the L2 cache.
+		 */
+		icache_disable();
+		dcache_disable();
+		clrbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN);
+	}
 
 	/*
 	 * We need to call mvebu_mbus_probe() before calling
@@ -399,14 +401,13 @@ void enable_caches(void)
 
 void v7_outer_cache_enable(void)
 {
-	struct pl310_regs *const pl310 =
-		(struct pl310_regs *)CONFIG_SYS_PL310_BASE;
-
-	/* The L2 cache is already disabled at this point */
-
 	if (mvebu_soc_family() == MVEBU_SOC_AXP) {
+		struct pl310_regs *const pl310 =
+			(struct pl310_regs *)CONFIG_SYS_PL310_BASE;
 		u32 u;
 
+		/* The L2 cache is already disabled at this point */
+
 		/*
 		 * For Aurora cache in no outer mode, enable via the CP15
 		 * coprocessor broadcasting of cache commands to L2.