nds32: Fix the allmodconfig build. To make sure CONFIG_CPU_LITTLE_ENDIAN is default y

This way we can build kernel with CONFIG_CPU_LITTLE_ENDIAN=y. Build allmodconfig
and allnoconfig are available too. It also fixes the endian mismatch issue
because AFLAGS and LDFLAGS is not passed correctly.

Signed-off-by: Vincent Ren-Wei Chen <vincentc@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
diff --git a/arch/nds32/Makefile b/arch/nds32/Makefile
index 20edf34..513bb2e 100644
--- a/arch/nds32/Makefile
+++ b/arch/nds32/Makefile
@@ -32,8 +32,12 @@
 
 ifdef CONFIG_CPU_LITTLE_ENDIAN
 KBUILD_CFLAGS   += $(call cc-option, -EL)
+KBUILD_AFLAGS   += $(call cc-option, -EL)
+LDFLAGS         += $(call cc-option, -EL)
 else
 KBUILD_CFLAGS   += $(call cc-option, -EB)
+KBUILD_AFLAGS   += $(call cc-option, -EB)
+LDFLAGS         += $(call cc-option, -EB)
 endif
 
 boot := arch/nds32/boot