Change in coreboot[master]: mb/google/dedede: add discrete TPM 2.0 configuration

[Aaron Durbin (Code Review)]

Attention is currently required from: Paul Menzel, Aseda Aboagye.
Aaron Durbin has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/52030 )

Change subject: mb/google/dedede: add discrete TPM 2.0 configuration
......................................................................

Patch Set 2:

(1 comment)

Patchset:

PS2:
> Do you need any changes to devicetree?

I checked the lalala static.c for presence of tpm device (where I added it in overridetree.cb). Likewise, gspi0 is turned off in lalala. I think I have that covered. FWIW, here's the diff:

```
$ diff -up src/mainboard/google/dedede/variants/magolor/overridetree.cb src/mainboard/google/dedede/variants/lalala/overridetree.cb 
--- src/mainboard/google/dedede/variants/magolor/overridetree.cb        2021-03-23 15:27:16.294009548 -0600
+++ src/mainboard/google/dedede/variants/lalala/overridetree.cb 2021-04-01 13:44:08.848445091 -0600
@@ -7,10 +7,6 @@ chip soc/intel/jasperlake
        #+-------------------+---------------------------+
        #| Field             |  Value                    |
        #+-------------------+---------------------------+
-       #| GSPI0             | cr50 TPM. Early init is   |
-       #|                   | required to set up a BAR  |
-       #|                   | for TPM communication     |
-       #|                   | before memory is up       |
        #| I2C0              | Trackpad                  |
        #| I2C1              | TBD                       |
        #| I2C2              | Touchscreen               |
@@ -19,10 +15,6 @@ chip soc/intel/jasperlake
        #| I2C5              | TBD                       |
        #+-------------------+---------------------------+
        register "common_soc_config" = "{
-               .gspi[0] = {
-                       .speed_mhz = 1,
-                       .early_init = 1,
-               },
                .i2c[0] = {
                        .speed = I2C_SPEED_FAST,
                        .speed_config[0] = {
@@ -298,7 +290,13 @@ chip soc/intel/jasperlake
                                device i2c 29 on end
                        end
                end
+               device pci 1e.2 off end # GSPI 0
                device pci 1f.3 on end # Intel HDA
+               device pci 1f.5 on
+                       chip drivers/pc80/tpm
+                               device pnp 0c31.0 on end # Discrete TPM
+                       end # chip drivers/pc80/tpm
+               end # PCH SPI
                device pci 1c.7 on
                        chip drivers/wifi/generic
                                register "wake" = "GPE0_DW2_03"
```