nb/intel/sandybridge: Update pei_data comments

Update outdated comments.

Change-Id: I100f71345281a1dc52e99d2395f528d60a9a1f58
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32706
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>

src/mainboard/samsung/lumpy/romstage.c

@@ -148,7 +148,6 @@ static const uint8_t *locate_spd(void)
 		die("SPD data not found.");
 	if (spd_file_len < (spd_index + 1) * 256)
 		die("Missing SPD data.");
-	// leave onboard dimm address at f0, and copy spd data there.
 	return spd_data[spd_index];
 }
 
@@ -198,7 +197,6 @@ void mainboard_fill_pei_data(struct pei_data *pei_data)
 		},
 	};
 	*pei_data = pei_data_template;
-	// leave onboard dimm address at f0, and copy spd data there.
 	memcpy(pei_data->spd_data[0], locate_spd(), 256);
 }
 

src/northbridge/intel/sandybridge/pei_data.h

@@ -105,9 +105,10 @@ struct pei_data
 	uint16_t usb_port_config[16][3];
 	/* See the usb3 struct above for details */
 	pch_usb3_controller_settings usb3;
-	/* SPD data array for onboard RAM. Specify address 0xf0,
-	 * 0xf1, 0xf2, 0xf3 to index one of the 4 slots in
-	 * spd_address for a given "DIMM".
+	/* SPD data array for onboard RAM.
+	 * spd_data [1..3] are ignored, instead the "dimm_channel{0,1}_disabled"
+	 * flag and the spd_addresses are used to determine which DIMMs should
+	 * use the SPD from spd_data[0].
 	 */
 	uint8_t spd_data[4][256];
 	tx_byte_func tx_byte;