Blackfin: tweak sram_alloc syscall decode

* system.c (sys_sram_alloc): The 2nd argument of sram_alloc syscall
is a bit field, not a specific value, so decode it as such.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/system.c b/system.c
index d5900c4..26d0d7f 100644
--- a/system.c
+++ b/system.c
@@ -378,7 +378,7 @@
 		/* size */
 		tprintf("%lu, ", tcp->u_arg[0]);
 		/* flags */
-		printxval(sram_alloc_flags, tcp->u_arg[1], "???_SRAM");
+		printflags(sram_alloc_flags, tcp->u_arg[1], "???_SRAM");
 	}
 	return 1;
 }