ARM: mxs: support full SPL framework

This allows using the full SPL framework on mxs devices.  In this
mode, the u-boot.sb image loaded by the boot ROM contains only the
SPL which then loads U-Boot proper or a kernel in falcon mode.

Signed-off-by: Mans Rullgard <mans@mansr.com>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 7212fc5..0acdd16 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1352,7 +1352,7 @@
 endmenu
 
 config SPL_LDSCRIPT
-        default "arch/arm/cpu/arm926ejs/mxs/u-boot-spl.lds" if ARCH_MX23 || ARCH_MX28
+        default "arch/arm/cpu/arm926ejs/mxs/u-boot-spl.lds" if (ARCH_MX23 || ARCH_MX28) && !SPL_FRAMEWORK
         default "arch/arm/cpu/arm1136/u-boot-spl.lds" if CPU_ARM1136
 	default "arch/arm/cpu/armv8/u-boot-spl.lds" if ARM64