[coreboot-gerrit] Change in coreboot[master]: ec/google: Add PSRC and PBOK method

[Tim Wawrzynczak (Code Review)]

Attention is currently required from: Varshit B Pandya, Subrata Banik, Rizwan Qureshi.
Tim Wawrzynczak has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/62945 )

Change subject: ec/google: Add PSRC and PBOK method
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Patch Set 2:

(1 comment)

File src/ec/google/chromeec/ec_dptf_helpers.c:

https://review.coreboot.org/c/coreboot/+/62945/comment/c49a3bc6_e15d7aaf 
PS2, Line 138: cpigen_write_store();
             : 	acpigen_emit_byte(ARG0_OP);
             : 	acpigen_emit_byte(LOCAL0_OP);
             : 
             : 	acpigen_emit_byte(AND_OP);
             : 	acpigen_emit_byte(LOCAL0_OP);
             : 	acpigen_write_byte(0x0F);
             : 	acpigen_emit_byte(LOCAL0_OP);
I think what Eric means if you can simplify this to:

```
    /* Local0 = Arg0 & 0x0f
    acpigen_emit_byte(AND_OP);
    acpigen_emit_byte(ARG0_OP);
    acpigen_write_byte(0x0f);
    acpigen_emit_byte(LOCAL0_OP);
```