cli_client: Add rpmc command support

This commit adds uses the new rpmc command implementation to
add them as a new feature to the cli_client.
Also adds the necessary documentation for this new feature.

Tested on the Winbond W25R128JV as a 'SFDP-capable chip'.

This patch was done to add rpmc command support to flashrom.
This enables users to write root keys to their flash chips while they
flash data on the chip. This might become useful in the future as rpmc
support is extended in coreboot.
Also adds debug tools to flashrom, which might be useful in
implementing coreboots rpmc support.

Change-Id: I36c823bbee65f256eb6edabe6f058321c9a0cfa1
Signed-off-by: Matti Finder <matti.finder@gmail.com>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/84840
Reviewed-by: Peter Marheine <pmarheine@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Anastasia Klimchuk <aklm@chromium.org>

doc/dev_guide/building_from_source.rst

@@ -20,10 +20,12 @@ And the following dependencies:
 * libftdi1 [#b2]_
 * libjaylink [#b2]_
 * NI-845x driver & library package [#b3]_
+* libcrypto [#b4]_
 
 .. [#b1] | optional, for building unit testing
 .. [#b2] | optional, depending on the selected programmer
 .. [#b3] | optional, proprietary and Windows only. (See Windows build instructions)
+.. [#b4] | optional, to enable RPMC commands
 
 If you are cross compiling, install the dependencies for your target.
 
@@ -56,7 +58,8 @@ Linux
 
       apt-get install -y \
       gcc meson ninja-build pkg-config python3-sphinx \
-      libcmocka-dev libpci-dev libusb-1.0-0-dev libftdi1-dev libjaylink-dev
+      libcmocka-dev libpci-dev libusb-1.0-0-dev libftdi1-dev libjaylink-dev \
+      libssl-dev
 
 * ArchLinux / Manjaro
 
@@ -64,7 +67,8 @@ Linux
 
       pacman -S --noconfirm \
       gcc meson ninja pkg-config python-sphinx cmocka \
-      pciutils libusb libftdi libjaylink
+      pciutils libusb libftdi libjaylink \
+      openssl
 
 * openSUSE / SUSE