ARM: mx3: introduce SOC_IMX31 and SOC_IMX35

Additionally convert some known to be good usages to the new
names.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
diff --git a/arch/arm/mach-mx3/mm.c b/arch/arm/mach-mx3/mm.c
index 2e81271..47118f7 100644
--- a/arch/arm/mach-mx3/mm.c
+++ b/arch/arm/mach-mx3/mm.c
@@ -36,7 +36,7 @@
  * @ingroup Memory
  */
 
-#ifdef CONFIG_ARCH_MX31
+#ifdef CONFIG_SOC_IMX31
 static struct map_desc mx31_io_desc[] __initdata = {
 	imx_map_entry(MX31, X_MEMC, MT_DEVICE),
 	imx_map_entry(MX31, AVIC, MT_DEVICE_NONSHARED),
@@ -64,9 +64,9 @@
 	mxc_init_irq(MX31_IO_ADDRESS(MX31_AVIC_BASE_ADDR));
 	imx31_register_gpios();
 }
-#endif /* ifdef CONFIG_ARCH_MX31 */
+#endif /* ifdef CONFIG_SOC_IMX31 */
 
-#ifdef CONFIG_ARCH_MX35
+#ifdef CONFIG_SOC_IMX35
 static struct map_desc mx35_io_desc[] __initdata = {
 	imx_map_entry(MX35, X_MEMC, MT_DEVICE),
 	imx_map_entry(MX35, AVIC, MT_DEVICE_NONSHARED),
@@ -90,7 +90,7 @@
 	mxc_init_irq(MX35_IO_ADDRESS(MX35_AVIC_BASE_ADDR));
 	imx35_register_gpios();
 }
-#endif /* ifdef CONFIG_ARCH_MX35 */
+#endif /* ifdef CONFIG_SOC_IMX35 */
 
 #ifdef CONFIG_CACHE_L2X0
 static int mxc_init_l2x0(void)