util/intelp2m: Add Intel Pad to Macro utility

This patch adds a new utility for converting a pad configuration from
the inteltool dump to the PAD_CFG_*() macros [1] for coreboot and GPIO
config data structures for FSP/sdk2-platforms/slimbootloader [2,3].

[1] src/soc/intel/common/block/include/intelblocks/gpio_defs.h
[2] https://slimbootloader.github.io/tools/index.html#gpio-tool
[3] 3rdparty/fsp/CometLakeFspBinPkg/CometLake1/Include/GpioSampleDef.h

Change-Id: If3e3b523c4f63dc2f91e9ccd16934e3a1b6e21fa
Signed-off-by: Maxim Polyakov <max.senia.poliak@gmail.com>
---
A util/intelp2m/Makefile
A util/intelp2m/config/config.go
A util/intelp2m/config/gopackages.png
A util/intelp2m/description.md
A util/intelp2m/fields/cb/cb.go
A util/intelp2m/fields/fields.go
A util/intelp2m/fields/fsp/fsp.go
A util/intelp2m/fields/raw/raw.go
A util/intelp2m/main.go
A util/intelp2m/parser/parser.go
A util/intelp2m/parser/template.go
A util/intelp2m/platforms/apl/macro.go
A util/intelp2m/platforms/apl/template.go
A util/intelp2m/platforms/common/macro.go
A util/intelp2m/platforms/common/register.go
A util/intelp2m/platforms/lbg/macro.go
A util/intelp2m/platforms/lbg/template.go
A util/intelp2m/platforms/snr/macro.go
A util/intelp2m/platforms/snr/template.go
19 files changed, 2,728 insertions(+), 0 deletions(-)