Multiple unrelated changes

CONFIG_BITBANG_SPI was not selected if CONFIG_NICINTEL_SPI was on by default.
Wiki output was missing all flash chips if CONFIG_INTERNAL was not
selected.
Use correct type for toupper()/tolower()/isspace() functions.
Specify software requirements in a generic way.
Non-x86 compilation does not work with the default programmer set, so
list the make parameters which result in a working build.

Corresponding to flashrom svn r1203.

Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Michael Karcher <flashrom@mkarcher.dialup.fu-berlin.de>
diff --git a/ft2232_spi.c b/ft2232_spi.c
index ee2b693..a2ea2a8 100644
--- a/ft2232_spi.c
+++ b/ft2232_spi.c
@@ -148,7 +148,7 @@
 	free(arg);
 	arg = extract_programmer_param("port");
 	if (arg) {
-		switch (toupper(*arg)) {
+		switch (toupper((unsigned char)*arg)) {
 		case 'A':
 			ft2232_interface = INTERFACE_A;
 			break;