makefile: riscv: Drop useless argument of prelink-riscv

The argv[2] is never used in prelink-riscv. Drop it.

Signed-off-by: Bin Meng <bmeng@tinylab.org>
Reviewed-by: Rick Chen <rick@andestech.com>
diff --git a/Makefile b/Makefile
index 5083bea..eaaf7d2 100644
--- a/Makefile
+++ b/Makefile
@@ -1761,7 +1761,7 @@
 endif
 
 ifeq ($(CONFIG_RISCV),y)
-	@tools/prelink-riscv $@ 0
+	@tools/prelink-riscv $@
 endif
 
 quiet_cmd_sym ?= SYM     $@