tree: Allow passing programmer_cfg directly to programmer

Modify the type signature of each programmer entry-point
xxx_init() functions to allow for the consumption of the
programmer parameterisation string data.

```
 $ find -name '*.c' -exec sed -i 's/_init(void)/_init(const char *prog_param)/g' '{}' \;
 $ find -name '*.c' -exec sed -i 's/get_params(/get_params(const char *prog_param, /g' '{}' \;
 $ find -name '*.c' -exec sed -i 's/const char \*prog_param)/const struct programmer_cfg *cfg)/g' '{}' \;
 $ find -name '*.c' -exec sed -i 's/const char \*prog_param,/const struct programmer_cfg *cfg,/g' '{}' \;
```
and manually fix up any remaining parts.

Change-Id: I8bab51a635b9d3a43e1619a7a32b334f4ce2cdd2
Signed-off-by: Edward O'Callaghan <quasisec@google.com>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/66655
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Anastasia Klimchuk <aklm@chromium.org>
Reviewed-by: Felix Singer <felixsinger@posteo.net>

buspirate_spi.c

@@ -314,7 +314,7 @@ static int buspirate_spi_send_command_v2(const struct flashctx *flash, unsigned
  */
 #define BP_DIVISOR(baud) ((4000000/(baud)) - 1)
 
-static int buspirate_spi_init(void)
+static int buspirate_spi_init(const struct programmer_cfg *cfg)
 {
 	char *tmp;
 	char *dev;