ARM: imx: Get the silicon version from the IIM module

Instead of reading the silicon version from ROM, we should
read the SREV register from the IIM.

Freescale has dropped all support for MX51 REV1.0, only MX51
REV 2.0 and 3.0 are valid.

Signed-off-by: Dinh Nguyen <Dinh.Nguyen@freescale.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
diff --git a/arch/arm/mach-mx5/mm.c b/arch/arm/mach-mx5/mm.c
index cbaf282..e57f968 100644
--- a/arch/arm/mach-mx5/mm.c
+++ b/arch/arm/mach-mx5/mm.c
@@ -68,7 +68,7 @@
 	unsigned long tzic_addr;
 	void __iomem *tzic_virt;
 
-	if (mx51_revision() < MX51_CHIP_REV_2_0)
+	if (mx51_revision() < IMX_CHIP_REVISION_2_0)
 		tzic_addr = MX51_TZIC_BASE_ADDR_TO1;
 	else
 		tzic_addr = MX51_TZIC_BASE_ADDR;