Fix compilation on SunOS

This came up when I was testing if building on SunOS still works
on the buildbot's instance of OmniOS r151014 which is based on illumos.

The fix is
 - to link against libnsl
 - a small C type fix in ich_descriptor_tool

Corresponding to flashrom svn r1950.
Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>

Makefile

@@ -926,7 +926,7 @@ endif
 
 ifneq ($(NEED_POSIX_SOCKETS), )
 ifeq ($(TARGET_OS), SunOS)
-LIBS += -lsocket
+LIBS += -lsocket -lnsl
 endif
 endif
 

util/ich_descriptors_tool/ich_descriptors_tool.c

@@ -170,7 +170,7 @@ int main(int argc, char *argv[])
 		usage(argv, "Seeking to the end of the file failed");
 
 #ifdef HAVE_MMAP
-	buf = mmap(NULL, len, PROT_READ, MAP_PRIVATE, fd, 0);
+	buf = (uint32_t *)mmap(NULL, len, PROT_READ, MAP_PRIVATE, fd, 0);
 	if (buf == (void *) -1)
 #endif
 	{