arm: orion5x: finish moving SoC to mach-orion5x

The SPL linker script had been left in arch/$(ARCH)/cpu/$(CPU)/$(SOC);
therefore move it to the already-established arch/$(ARCH)/mach-$(SOC)
location.

Signed-off-by: Trevor Woerner <twoerner@gmail.com>
diff --git a/configs/edminiv2_defconfig b/configs/edminiv2_defconfig
index d06f83d..9a9d9c5 100644
--- a/configs/edminiv2_defconfig
+++ b/configs/edminiv2_defconfig
@@ -1,7 +1,7 @@
 CONFIG_ARM=y
 CONFIG_ARCH_CPU_INIT=y
 CONFIG_ARCH_ORION5X=y
-CONFIG_SPL_LDSCRIPT="arch/arm/cpu/arm926ejs/orion5x/u-boot-spl.lds"
+CONFIG_SPL_LDSCRIPT="arch/arm/mach-orion5x/u-boot-spl.lds"
 CONFIG_SYS_TEXT_BASE=0x00800000
 CONFIG_SPL_LIBCOMMON_SUPPORT=y
 CONFIG_SPL_LIBGENERIC_SUPPORT=y