qoriq: use KERNEL_SUFFIX in Build/sdcard-img

Use the KERNEL_SUFFIX variable in Build/sdcard-img, rather than
using hardcoded "-kernel.bin", to allow overriding KERNEL_SUFFIX for a
device.

Fixes: 080a769 ("qoriq: new target")
Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>

target/linux/qoriq/image/Makefile

@@ -8,7 +8,7 @@ SQUASHFSCOMP := xz $(LZMA_XZ_OPTIONS)
 define Build/sdcard-img
         rm -fR $@.boot
         mkdir -p $@.boot
-        $(CP) $(KDIR)/$(DEVICE_NAME)-kernel.bin $@.boot
+        $(CP) $(KDIR)/$(DEVICE_NAME)$(KERNEL_SUFFIX) $@.boot
         $(if $(DEVICE_DTS),\
                 $(foreach dtb,$(DEVICE_DTS),$(CP) $(KDIR)/image-$(dtb).dtb $@.boot), \
                 $(CP) $(KDIR)/image-/*.dtb $@.boot)