MIPS: Remove useless zero initializations.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/dec/prom/memory.c b/arch/mips/dec/prom/memory.c
index 5a557e2..e95ff30 100644
--- a/arch/mips/dec/prom/memory.c
+++ b/arch/mips/dec/prom/memory.c
@@ -18,7 +18,7 @@
 #include <asm/sections.h>
 
 
-volatile unsigned long mem_err = 0;	/* So we know an error occurred */
+volatile unsigned long mem_err;		/* So we know an error occurred */
 
 /*
  * Probe memory in 4MB chunks, waiting for an error to tell us we've fallen