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-spi_imx.c b/arch/arm/plat-mxc/devices/platform-spi_imx.c
index e48340e..bf2cb47 100644
--- a/arch/arm/plat-mxc/devices/platform-spi_imx.c
+++ b/arch/arm/plat-mxc/devices/platform-spi_imx.c
@@ -29,7 +29,7 @@
 	imx21_cspi_data_entry(1, 2),
 #endif
 
-#ifdef CONFIG_ARCH_MX25
+#ifdef CONFIG_SOC_IMX25
 const struct imx_spi_imx_data imx25_cspi_data[] __initconst = {
 #define imx25_cspi_data_entry(_id, _hwid)				\
 	imx_spi_imx_data_entry(MX25, CSPI, "imx25-cspi", _id, _hwid, SZ_16K)
@@ -37,7 +37,7 @@
 	imx25_cspi_data_entry(1, 2),
 	imx25_cspi_data_entry(2, 3),
 };
-#endif /* ifdef CONFIG_ARCH_MX25 */
+#endif /* ifdef CONFIG_SOC_IMX25 */
 
 #ifdef CONFIG_SOC_IMX27
 const struct imx_spi_imx_data imx27_cspi_data[] __initconst = {