Fix SPL build for non-ARM targets

Signed-off-by: Albert ARIBAUD <albert.u.boot@aribaud.net>
diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile
index 2c3812c..c77c0c4 100644
--- a/drivers/mtd/nand/Makefile
+++ b/drivers/mtd/nand/Makefile
@@ -79,6 +79,10 @@
 COBJS-$(CONFIG_NAND_OMAP_GPMC) += omap_gpmc.o
 COBJS-$(CONFIG_NAND_PLAT) += nand_plat.o
 
+else  # minimal SPL drivers
+
+COBJS-$(CONFIG_NAND_FSL_ELBC) += fsl_elbc_spl.o
+
 endif # drivers
 endif # nand