tree: Change signature of extract_programmer_param_str()

Results can be reproduced with the following invocation;
```
 $ find -name '*.c' -exec sed -i 's/extract_programmer_param_str(/extract_programmer_param_str(NULL, /g' '{}' \;
```

This allows for a pointer to the actual programmer parameters
to be passed instead of a global.

Change-Id: I781a328fa280e0a9601050dd99a75af72c39c899
Signed-off-by: Edward O'Callaghan <quasisec@google.com>
---
M atavia.c
M buspirate_spi.c
M chipset_enable.c
M dediprog.c
M developerbox_spi.c
M digilent_spi.c
M dummyflasher.c
M flashrom.c
M ft2232_spi.c
M i2c_helper_linux.c
M ichspi.c
M include/programmer.h
M internal.c
M it87spi.c
M jlink_spi.c
M linux_mtd.c
M linux_spi.c
M mediatek_i2c_spi.c
M mstarddc_spi.c
M ni845x_spi.c
M ogp_spi.c
M parade_lspcon.c
M pcidev.c
M pickit2_spi.c
M pony_spi.c
M raiden_debug_spi.c
M rayer_spi.c
M realtek_mst_i2c_spi.c
M sb600spi.c
M serprog.c
M stlinkv3_spi.c
M usb_device.c
32 files changed, 106 insertions(+), 83 deletions(-)