Kill central list of SPI programmers

Remove the array spi_programmer, replace it by dynamic registration
instead. Also initially start with no busses supported, and switch to
the default non-SPI only for the internal programmer.

Also this patch changes the initialization for the buses_supported variable
from "everything-except-SPI" to "nothing". All programmers have to set the
bus type on their own, and this enables register_spi_programmer to just add
the SPI both for on-board SPI interfaces (where the internal programmer
already detected the other bus types), as well as for external programmers
(where we have the default "none").

Corresponding to flashrom svn r1299.

Signed-off-by: Michael Karcher <flashrom@mkarcher.dialup.fu-berlin.de>
Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
diff --git a/bitbang_spi.c b/bitbang_spi.c
index d63c769..3c718af 100644
--- a/bitbang_spi.c
+++ b/bitbang_spi.c
@@ -64,6 +64,19 @@
 		bitbang_spi_master->release_bus();
 }
 
+static int bitbang_spi_send_command(unsigned int writecnt, unsigned int readcnt,
+		const unsigned char *writearr, unsigned char *readarr);
+
+static const struct spi_programmer spi_programmer_bitbang = {
+	.type = SPI_CONTROLLER_BITBANG,
+	.max_data_read = MAX_DATA_READ_UNLIMITED,
+	.max_data_write = MAX_DATA_WRITE_UNLIMITED,
+	.command = bitbang_spi_send_command,
+	.multicommand = default_spi_send_multicommand,
+	.read = default_spi_read,
+	.write_256 = default_spi_write_256,
+};
+
 int bitbang_spi_init(const struct bitbang_spi_master *master, int halfperiod)
 {
 	/* BITBANG_SPI_INVALID is 0, so if someone forgot to initialize ->type,
@@ -85,6 +98,8 @@
 	bitbang_spi_master = master;
 	bitbang_spi_half_period = halfperiod;
 
+	register_spi_programmer(&spi_programmer_bitbang);
+
 	/* FIXME: Run bitbang_spi_request_bus here or in programmer init? */
 	bitbang_spi_set_cs(1);
 	bitbang_spi_set_sck(0);
@@ -127,7 +142,7 @@
 	return ret;
 }
 
-int bitbang_spi_send_command(unsigned int writecnt, unsigned int readcnt,
+static int bitbang_spi_send_command(unsigned int writecnt, unsigned int readcnt,
 		const unsigned char *writearr, unsigned char *readarr)
 {
 	int i;