imx: mx6: hab : Remove the cache issue workaroud in hab for i.MX6QP

Since the i.MX6QP has fixed the issue in boot ROM, so remove the workaround
for i.MX6QP.

Signed-off-by: Ye.Li <B37916@freescale.com>
Signed-off-by: Peng Fan <Peng.Fan@freescale.com>
Acked-by: Stefano Babic <sbabic@denx.de>

arch/arm/cpu/armv7/mx6/hab.c

@@ -423,7 +423,8 @@ uint32_t authenticate_image(uint32_t ddr_start, uint32_t image_size)
 					 * do cache flushes. don't think any
 					 * exist, so we ignore them.
 					 */
-					writel(1, MX6DQ_PU_IROM_MMU_EN_VAR);
+					if (!is_mx6dqp())
+						writel(1, MX6DQ_PU_IROM_MMU_EN_VAR);
 				} else if (is_cpu_type(MXC_CPU_MX6DL) ||
 					   is_cpu_type(MXC_CPU_MX6SOLO)) {
 					writel(1, MX6DLS_PU_IROM_MMU_EN_VAR);