mb/google/zork/var/shuboz: adjust I2C2 data hold time for TP

Add ".data_hold_time_ns" to follow I2C specification.
The adjusted result aobut 0.315us(more than 0.3us)

BUG=b:181091107
BRANCH=zork
TEST=emerge-zork coreboot chromeos-bootimage

Signed-off-by: Kane Chen <kane_chen@pegatron.corp-partner.google.com>
Change-Id: Id92fadcb54b9722709e32ced1f0be001b8c97975
Reviewed-on: https://review.coreboot.org/c/coreboot/+/51361
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>

src/mainboard/google/zork/variants/shuboz/overridetree.cb

@@ -29,6 +29,7 @@ chip soc/amd/picasso
 		.speed = I2C_SPEED_FAST,
 		.rise_time_ns = 18,  /* 0 to 2.31 (3.3 * .7) */
 		.fall_time_ns = 57,  /* 2.31 to 0 */
+		.data_hold_time_ns = 335,
 	}"
 
 	# I2C3 for H1