[source] base-files: add generic board_name function to functions.sh

[LEDE Commits]

nbd pushed a commit to source.git, branch master:
https://git.lede-project.org/ec991424749b9eed37d01bc8adb9fb22fb0c98a7

commit ec991424749b9eed37d01bc8adb9fb22fb0c98a7
Author: Felix Fietkau <nbd at nbd.name>
AuthorDate: Fri Mar 17 16:12:27 2017 +0100

    base-files: add generic board_name function to functions.sh
    
    This will be used to replace all those nasty board specific scripts
    that do basically the same thing
    
    Signed-off-by: Felix Fietkau <nbd at nbd.name>
---
 package/base-files/files/lib/functions.sh | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/package/base-files/files/lib/functions.sh b/package/base-files/files/lib/functions.sh
index b68db6b..2b6415a 100755
--- a/package/base-files/files/lib/functions.sh
+++ b/package/base-files/files/lib/functions.sh
@@ -353,4 +353,8 @@ user_exists() {
 	grep -qs "^${1}:" ${IPKG_INSTROOT}/etc/passwd
 }
 
+board_name() {
+	[ -e /tmp/sysinfo/board_name ] && cat /tmp/sysinfo/board_name || echo "generic"
+}
+
 [ -z "$IPKG_INSTROOT" -a -f /lib/config/uci.sh ] && . /lib/config/uci.sh