Kbuild: add LDFLAGS_STANDALONE

Introduce a new Makefile variable for passing LDFLAGS to standalone
programs. Currently the variable CONFIG_STANDALONE_LOAD_ADDR is
misued on some archs to pass a specific linker script.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Rick Chen <rick@andestech.com>
diff --git a/arch/nds32/config.mk b/arch/nds32/config.mk
index c5520fd..12cec36 100644
--- a/arch/nds32/config.mk
+++ b/arch/nds32/config.mk
@@ -12,8 +12,8 @@
 CROSS_COMPILE := nds32le-linux-
 endif
 
-CONFIG_STANDALONE_LOAD_ADDR = 0x300000 \
-			      -T $(srctree)/examples/standalone/nds32.lds
+CONFIG_STANDALONE_LOAD_ADDR = 0x300000
+LDFLAGS_STANDALONE	+= -T $(srctree)/examples/standalone/nds32.lds
 
 PLATFORM_RELFLAGS	+= -fno-common -mrelax
 PLATFORM_RELFLAGS	+= -gdwarf-2