board: rename "tqc" vendor to "tq"

The subdivision name "TQ Components" hasn't been in use for a long time.
Rename the vendor directory to "tq", which also matches our Device Tree
vendor prefix.

Signed-off-by: Matthias Schiffer <matthias.schiffer@ew.tq-group.com>
diff --git a/board/tq/tqma6/MAINTAINERS b/board/tq/tqma6/MAINTAINERS
new file mode 100644
index 0000000..dae719f
--- /dev/null
+++ b/board/tq/tqma6/MAINTAINERS
@@ -0,0 +1,6 @@
+TQ SYSTEMS TQMA6 BOARD
+M:	Markus Niebel <Markus.Niebel@tq-group.com>
+S:	Maintained
+F:	board/tq/tqma6/
+F:	include/configs/tqma6.h
+F:	configs/tqma6*_defconfig