mxs: reorganize source directory for easy sharing of code in i.MXS SoCs

Most code can be shared between i.MX23 and i.MX28 as both are from
i.MXS family; this source directory structure makes easy to share code
among them.

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
Acked-by: Stefano Babic <sbabic@denx.de>
diff --git a/include/configs/apx4devkit.h b/include/configs/apx4devkit.h
index 9e7ead5..59b451b 100644
--- a/include/configs/apx4devkit.h
+++ b/include/configs/apx4devkit.h
@@ -42,8 +42,8 @@
 /* SPL */
 #define CONFIG_SPL
 #define CONFIG_SPL_NO_CPU_SUPPORT_CODE
-#define CONFIG_SPL_START_S_PATH	"arch/arm/cpu/arm926ejs/mx28"
-#define CONFIG_SPL_LDSCRIPT	"arch/arm/cpu/arm926ejs/mx28/u-boot-spl.lds"
+#define CONFIG_SPL_START_S_PATH	"arch/arm/cpu/arm926ejs/mxs"
+#define CONFIG_SPL_LDSCRIPT	"arch/arm/cpu/arm926ejs/mxs/u-boot-spl.lds"
 #define CONFIG_SPL_LIBCOMMON_SUPPORT
 #define CONFIG_SPL_LIBGENERIC_SUPPORT
 #define CONFIG_SPL_GPIO_SUPPORT