broadwell boards: Do not set ddr_refresh_2x again

The `ddr_refresh_2x` setting is already set in chipset code.

Change-Id: I76478689b3aa27c369a0413d9fbde03674d5e528
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/55810
Reviewed-by: Michael Niewöhner <foss@mniewoehner.de>
Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/google/auron/variants/buddy/spd/spd.c

@@ -9,6 +9,4 @@ void mainboard_fill_spd_data(struct pei_data *pei_data)
 {
 	pei_data->spd_addresses[0] = 0xa0;
 	pei_data->spd_addresses[2] = 0xa4;
-	/* Enable 2x refresh mode */
-	pei_data->ddr_refresh_2x = 1;
 }

src/mainboard/google/jecht/spd/spd.c

@@ -8,6 +8,4 @@ void mainboard_fill_spd_data(struct pei_data *pei_data)
 {
 	pei_data->spd_addresses[0] = 0xa0;
 	pei_data->spd_addresses[2] = 0xa4;
-	// Enable 2x refresh mode
-	pei_data->ddr_refresh_2x = 1;
 }