ARM: imx: use SOC_IMX25 instead of ARCH_MX25 for multi-SoC

Some usages of ARCH_MX25 are assuming that if it is
defined the other SoCs are undefined.  Use SOC_IMX25 for the save
places.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
diff --git a/arch/arm/plat-mxc/devices/platform-fec.c b/arch/arm/plat-mxc/devices/platform-fec.c
index 11d087f..e6a365e 100644
--- a/arch/arm/plat-mxc/devices/platform-fec.c
+++ b/arch/arm/plat-mxc/devices/platform-fec.c
@@ -16,10 +16,10 @@
 		.irq = soc ## _INT_FEC,					\
 	}
 
-#ifdef CONFIG_ARCH_MX25
+#ifdef CONFIG_SOC_IMX25
 const struct imx_fec_data imx25_fec_data __initconst =
 	imx_fec_data_entry_single(MX25);
-#endif /* ifdef CONFIG_ARCH_MX25 */
+#endif /* ifdef CONFIG_SOC_IMX25 */
 
 #ifdef CONFIG_SOC_IMX27
 const struct imx_fec_data imx27_fec_data __initconst =