src/mainboard/*/*/board_info.txt: Added Release year for boards

To simplify browsing the "Supported hardware" list, I added Release year
for the hardware from asus, asrock, gigabyte, msi, via, tyan, intel,
lenovo, apple, jetway and hp. Still several models and manufacturers to
add information to. This is more of a proof-of-concept.
The "Release year" will be shown in the wiki page.

Change-Id: I6bc14ed06ac7c6b3c9f054b49f08cb9b3dc47947
Signed-off-by: Mathias Friman <mathias@workplays.se>
Reviewed-on: http://review.coreboot.org/9963
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-by: Edward O'Callaghan <edward.ocallaghan@koparo.com>
diff --git a/src/mainboard/msi/ms6147/board_info.txt b/src/mainboard/msi/ms6147/board_info.txt
index 62d41dd..5c4f8e8 100644
--- a/src/mainboard/msi/ms6147/board_info.txt
+++ b/src/mainboard/msi/ms6147/board_info.txt
@@ -3,3 +3,4 @@
 ROM package: DIP32
 ROM protocol: Parallel
 ROM socketed: y
+Release year: 1999