nb/intel/haswell/pei_data.h: Define `SPD_LEN`

Change-Id: I34561372bcdd00b1b3e4dcd6be89fa47d2af9b42
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/50541
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/northbridge/intel/haswell/pei_data.h b/src/northbridge/intel/haswell/pei_data.h
index 6bdfde4..4f2f80d 100644
--- a/src/northbridge/intel/haswell/pei_data.h
+++ b/src/northbridge/intel/haswell/pei_data.h
@@ -8,6 +8,8 @@
 typedef void (*tx_byte_func)(unsigned char byte);
 #define PEI_VERSION 15
 
+#define SPD_LEN 256
+
 #define MAX_USB2_PORTS 16
 #define MAX_USB3_PORTS 16
 #define USB_OC_PIN_SKIP 8
@@ -82,7 +84,7 @@
 	int usb_xhci_on_resume;
 	struct usb2_port_setting usb2_ports[MAX_USB2_PORTS];
 	struct usb3_port_setting usb3_ports[MAX_USB3_PORTS];
-	uint8_t spd_data[4][256];
+	uint8_t spd_data[4][SPD_LEN];
 	tx_byte_func tx_byte;
 } __packed;