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>

flashrom.8

@@ -187,6 +187,9 @@ USB SPI programmer)"
 .sp
 .BR "* buspirate_spi" " (for SPI flash ROMs attached to a Bus Pirate)"
 .sp
+.BR "* rayer_spi" " (for SPI flash ROMs attached to a RayeR parport \
+based programmer)"
+.sp
 Some programmers have optional or mandatory parameters which are described
 in detail in the
 .B PROGRAMMER SPECIFIC INFO
@@ -389,6 +392,10 @@ where
 can be any of
 .BR 30k ", " 125k ", " 250k ", " 1M ", " 2M ", " 2.6M ", " 4M ", " 8M
 (in Hz). The default is the maximum frequency of 8 MHz.
+.TP
+.BR "rayer_spi " programmer
+No parameters defined yet. More information about the hardware is available at
+http://rayer.ic.cz/elektro/spipgm.htm
 .SH EXIT STATUS
 flashrom exits with 0 on success, 1 on most failures but with 2 if /dev/mem
 (/dev/xsvc on Solaris) can not be opened and with 3 if a call to mmap() fails.
@@ -411,6 +418,9 @@ needs PCI configuration space access and raw I/O port access.
 .BR gfxnvidia " and " drkaiser
 need PCI configuration space access and raw memory access.
 .sp
+.B rayer_spi
+needs raw I/O port access.
+.sp
 .B satasii
 needs PCI configuration space read access and raw memory access.
 .sp