mb/google/brya/var/gladios: Update audio codec i2c timing

Adjust audio codec i2c timing to 399 kHz.

BUG=b:262959586
TEST=FW_NAME=gladios emerge-brask coreboot

Signed-off-by: Kevin Chiu <kevin.chiu.17802@gmail.com>
Change-Id: I2f621e3af39fb40ab270c9de35d51dd43147b8f7
Reviewed-on: https://review.coreboot.org/c/coreboot/+/70897
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Ricky Chang <rickytlchang@google.com>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>

src/mainboard/google/brya/variants/gladios/overridetree.cb

@@ -23,7 +23,7 @@ chip soc/intel/alderlake
 	register "common_soc_config" = "{
 		.i2c[0] = {
 			.speed = I2C_SPEED_FAST,
-			.rise_time_ns = 650,
+			.rise_time_ns = 600,
 			.fall_time_ns = 400,
 			.data_hold_time_ns = 50,
 		},