board: tq: fix spelling of "TQ-Systems"

"TQ-Systems" is written with a dash.

Signed-off-by: Matthias Schiffer <matthias.schiffer@ew.tq-group.com>
diff --git a/arch/arm/mach-imx/mx6/Kconfig b/arch/arm/mach-imx/mx6/Kconfig
index d701a46..62de942 100644
--- a/arch/arm/mach-imx/mx6/Kconfig
+++ b/arch/arm/mach-imx/mx6/Kconfig
@@ -569,7 +569,7 @@
 	imply CMD_SPL
 
 config TARGET_TQMA6
-	bool "TQ Systems TQMa6 board"
+	bool "TQ-Systems TQMa6 board"
 	select BOARD_EARLY_INIT_F
 	select BOARD_LATE_INIT
 	select MXC_SPI