mb/google/guybrush: Set TPM to to be kernel power managed.

Set TPM power_managed_mode to TPM_KERNEL_POWER_MANAGED. This will cause
the TPM kernel driver to send a shutdown command before s0i3 entry. This
change depends on S0i3 verstage running and reinitializing the TPM.

BUG=b:200578885
BRANCH=None
TEST=TPM shutdown sent during s0i3 entry on guybrush

Change-Id: I206022cc2a29690186206966c5d45bd55c303248
Signed-off-by: Rob Barnes <robbarnes@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/60081
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>

src/mainboard/google/guybrush/variants/baseboard/devicetree.cb

@@ -342,6 +342,8 @@ chip soc/amd/cezanne
 			register "hid" = ""GOOG0005""
 			register "desc" = ""Cr50 TPM""
 			register "irq_gpio" = "ACPI_GPIO_IRQ_EDGE_LOW(GPIO_85)"
+			register "power_managed_mode" = "CONFIG(PSP_S0I3_RESUME_VERSTAGE) ?
+							 TPM_KERNEL_POWER_MANAGED : TPM_DEFAULT_POWER_MANAGED"
 			device i2c 50 alias cr50 on end
 		end
 	end