Complete and fix progress feature implementation for all operations

Original progress reporting implemented in CB:49643 and it has some
issues, for example:

    size_t start_address = start;
    size_t end_address = len - start;

End address is anything but length minus start address.

    update_progress(flash,
                    FLASHROM_PROGRESS_READ,
                    /*current*/ start - start_address + to_read,
                    /*total*/ end_address);

Total should just be length if that's how current value is computed.

---

libflashrom needs to know total size ahead of time.
That's init_progress() and changed update_progress().

It also needs to store the last current value to be able to update it.
That's stage_progress in flashrom_flashctx.

Measuring accurately amount of data which will be read/erased/written
isn't easy because things can be skipped as optimizations.  Current
values are probably off, there are TODO/FIXME comments.

---

CLI shares terminal with the rest of the code and has to maintain more
state to handle that reasonably well.

The progress doesn't just dump lots of stuff on the screen which
probably won't fly because of CB:64668, but it's not hard to adjust
this.

---

A script to test the CLI:

\#!/bin/bash
t=${1:-rewW}
shift

if [[ $t =~ r ]]; then
    echo ">>> READ"
    ./flashrom -p dummy:emulate=W25Q128FV,freq=64mhz -r dump.rom --progress "$@"
    echo
fi

if [[ $t =~ e ]]; then
    echo ">>> ERASE"
    ./flashrom -p dummy:emulate=W25Q128FV,freq=64mhz -E --progress "$@"
    echo
fi

if [[ $t =~ w ]]; then
    echo ">>> WRITE (without erase)"
    dd if=/dev/zero of=zero.rom bs=1M count=16 2> /dev/null
    ./flashrom -p dummy:emulate=W25Q128FV,freq=64mhz -w zero.rom --progress "$@"
    echo
fi

if [[ $t =~ W ]]; then
    echo ">>> WRITE (with erase)"
    dd if=/dev/zero of=zero.rom bs=1M count=16 2> /dev/null
    dd if=/dev/random of=random.rom bs=1M count=16 2> /dev/null
    ./flashrom -p dummy:emulate=W25Q128FV,freq=64mhz,image=random.rom -w zero.rom --progress "$@"
    echo
fi

Change-Id: If1e40fc97f443c4f0c0501cef11cff1f3f84c051
Signed-off-by: Sergii Dmytruk <sergii.dmytruk@3mdeb.com>
Signed-off-by: Anastasia Klimchuk <aklm@flashrom.org>
---
M 82802ab.c
M at45db.c
M cli_classic.c
M cli_output.c
M dediprog.c
M en29lv640b.c
M erasure_layout.c
M flashrom.c
M include/flash.h
M it87spi.c
M jedec.c
M libflashrom.c
M linux_mtd.c
M parade_lspcon.c
M realtek_mst_i2c_spi.c
M spi.c
M spi25.c
M sst28sf040.c
18 files changed, 181 insertions(+), 38 deletions(-)