nb/intel/sandybridge: Replace memset with initializer

There's no need to use `memset` here.

Change-Id: I0478bc3ff25b75bf0b554aa83ead6a63fcbd975c
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/49064
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
diff --git a/src/northbridge/intel/sandybridge/raminit_common.c b/src/northbridge/intel/sandybridge/raminit_common.c
index 3c60a9f..61663b8 100644
--- a/src/northbridge/intel/sandybridge/raminit_common.c
+++ b/src/northbridge/intel/sandybridge/raminit_common.c
@@ -1137,11 +1137,9 @@
 static void fine_tune_rcven_pi(ramctr_timing *ctrl, int channel, int slotrank, int *upperA)
 {
 	int rcven_delta;
-	int statistics[NUM_LANES][51];
+	int statistics[NUM_LANES][51] = {0};
 	int lane, i;
 
-	memset(statistics, 0, sizeof(statistics));
-
 	for (rcven_delta = -25; rcven_delta <= 25; rcven_delta++) {
 
 		FOR_ALL_LANES {