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>

Makefile

@@ -111,8 +111,15 @@ CONFIG_INTERNAL ?= yes
 # Always enable serprog for now. Needs to be disabled on Windows.
 CONFIG_SERPROG ?= yes
 
-# Bitbanging SPI infrastructure is not used yet.
+# RayeR SPIPGM hardware support
+CONFIG_RAYER_SPI ?= yes
+
+# Bitbanging SPI infrastructure, default off unless needed.
+ifeq ($(CONFIG_RAYER_SPI), yes)
+override CONFIG_BITBANG_SPI = yes
+else
 CONFIG_BITBANG_SPI ?= no
+endif
 
 # Always enable 3Com NICs for now.
 CONFIG_NIC3COM ?= yes
@@ -166,6 +173,13 @@ NEED_SERIAL := yes
 NEED_NET := yes
 endif
 
+ifeq ($(CONFIG_RAYER_SPI), yes)
+FEATURE_CFLAGS += -D'CONFIG_RAYER_SPI=1'
+PROGRAMMER_OBJS += rayer_spi.o
+# Actually, NEED_PCI is wrong. NEED_IOPORT_ACCESS would be more correct.
+NEED_PCI := yes
+endif
+
 ifeq ($(CONFIG_BITBANG_SPI), yes)
 FEATURE_CFLAGS += -D'CONFIG_BITBANG_SPI=1'
 PROGRAMMER_OBJS += bitbang_spi.o