TSP: add PIE support

This implementation simply mimics that of BL31.

Change-Id: Ibbaa4ca012d38ac211c52b0b3e97449947160e07
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/Makefile b/Makefile
index 0193c29..bd52c0b 100644
--- a/Makefile
+++ b/Makefile
@@ -472,6 +472,10 @@
 endif
 	BL31_CFLAGS	+=	-fpie
 	BL31_LDFLAGS	+=	$(PIE_LDFLAGS)
+ifeq ($(ARCH),aarch64)
+	BL32_CFLAGS	+=	-fpie
+	BL32_LDFLAGS	+=	$(PIE_LDFLAGS)
+endif
 endif
 
 # Include the CPU specific operations makefile, which provides default