MX51: add CONFIG_SYS_TEXT_BASE to vision2 board, use general ld script

Recent patch changed TEXT_BASE to CONFIG_SYS_TEXT_BASE and
vision2 board was not updated.

Signed-off-by: Stefano Babic <sbabic@denx.de>
diff --git a/board/ttcontrol/vision2/config.mk b/board/ttcontrol/vision2/config.mk
index 59f3367..952037e 100644
--- a/board/ttcontrol/vision2/config.mk
+++ b/board/ttcontrol/vision2/config.mk
@@ -20,6 +20,6 @@
 # MA 02111-1307 USA
 #
 
-LDSCRIPT = $(CPUDIR)/$(SOC)/u-boot.lds
-TEXT_BASE = 0x97800000
+CONFIG_SYS_TEXT_BASE = 0x97800000
 IMX_CONFIG = $(SRCTREE)/board/$(BOARDDIR)/imximage_hynix.cfg
+ALL += $(obj)u-boot.imx