Add support for RayeR SPIPGM hardware as described in http://rayer.ic.cz/elektro/spipgm.htm

To use the RayeR driver, run
flashrom -p rayer_spi -V

Known bugs/limitations:
- Won't compile/work on non-x86 architectures.
- Will always use direct port I/O access.

Log follows:

flashrom v0.9.2-r1039 on MS-DOS 7 (i686), built with libpci 3.1.5, GCC 
4.3.2, little endian
Calibrating delay loop... OK.
Initializing rayer_bitbang_spi programmer
Using port 0x378 as I/O base for parallel port access.
...
Probing for Macronix MX25L1605, 2048 KB: probe_spi_rdid_generic: id1 
0xc2, id2 0x2015
...
Found chip "Macronix MX25L1605" (2048 KB, SPI) at physical address 
0xffe00000.
...
No operations were specified.

Corresponding to flashrom svn r1093.

Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Martin Rehak <rayer@seznam.cz>
Acked-by: Michael Karcher <flashrom@mkarcher.dialup.fu-berlin.de>

flash.h

@@ -80,6 +80,9 @@ enum programmer {
 #endif
 #if CONFIG_DEDIPROG == 1
 	PROGRAMMER_DEDIPROG,
+#endif
+#if CONFIG_RAYER_SPI == 1
+	PROGRAMMER_RAYER_SPI,
 #endif
 	PROGRAMMER_INVALID /* This must always be the last entry. */
 };
@@ -129,6 +132,9 @@ void programmer_delay(int usecs);
 
 enum bitbang_spi_master_type {
 	BITBANG_SPI_INVALID	= 0, /* This must always be the first entry. */
+#if CONFIG_RAYER_SPI == 1
+	BITBANG_SPI_MASTER_RAYER,
+#endif
 };
 
 struct bitbang_spi_master {
@@ -531,6 +537,11 @@ int ft2232_spi_send_command(unsigned int writecnt, unsigned int readcnt, const u
 int ft2232_spi_read(struct flashchip *flash, uint8_t *buf, int start, int len);
 int ft2232_spi_write_256(struct flashchip *flash, uint8_t *buf, int start, int len);
 
+/* rayer_spi.c */
+#if CONFIG_RAYER_SPI == 1
+int rayer_spi_init(void);
+#endif
+
 /* bitbang_spi.c */
 int bitbang_spi_init(const struct bitbang_spi_master *master, int halfperiod);
 int bitbang_spi_send_command(unsigned int writecnt, unsigned int readcnt, const unsigned char *writearr, unsigned char *readarr);
@@ -649,6 +660,9 @@ enum spi_controller {
 #endif
 #if CONFIG_DEDIPROG == 1
 	SPI_CONTROLLER_DEDIPROG,
+#endif
+#if CONFIG_RAYER_SPI == 1
+	SPI_CONTROLLER_RAYER,
 #endif
 	SPI_CONTROLLER_INVALID /* This must always be the last entry. */
 };