screebo: fix the lp5ccc config from 0x55 to 0xaa

BUG=b:278022971
TEST=verified on screebo

Change-Id: I16f1d66ca7f885120358eb2a2d3c6fb111319f11
Signed-off-by: Simon Zhou <zhouguohui@huaqin.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/75173
Reviewed-by: Subrata Banik <subratabanik@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/google/rex/variants/screebo/memory.c

@@ -61,7 +61,7 @@ static const struct mb_cfg baseboard_memcfg = {
 	},
 
 	.lp5x_config = {
-		.ccc_config = 0x55,
+		.ccc_config = 0xaa,
 	},
 
 	.ect = 1, /* Early Command Training */