spd.c: Remove dead assignment

Change-Id: I1acae81c9a5b12a118a31c48c3a5d9bca35b8783
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/memtest86plus/+/36704
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>
diff --git a/spd.c b/spd.c
index d30e3e2..15128a4 100644
--- a/spd.c
+++ b/spd.c
@@ -76,7 +76,7 @@
 	unsigned long x;
 	int result;
 
-	result = pci_conf_read(0, smbdev, smbfun, 0x08, 1, &x);
+	(void)pci_conf_read(0, smbdev, smbfun, 0x08, 1, &x);
 
 	if (x < 0x40) {
 		// SB600/700