jacinto6evm: update fastboot script for J6 EVM

Update fastboot script to keep 7" panel as default for J6 EVM boards.

Change-Id: I26099079fa92b1b01b7da7d1e9d704ad263d08ab
Signed-off-by: Vishal Mahaveer <vishalm@ti.com>
diff --git a/fastboot.sh b/fastboot.sh
index 967901d..4f06e90 100755
--- a/fastboot.sh
+++ b/fastboot.sh
@@ -81,7 +81,7 @@
 if [ ${cpu} = "J6ECO" ]; then
         environment="${PRODUCT_OUT}dra72-evm-lcd10.dtb"
 else
-        environment="${PRODUCT_OUT}dra7-evm-lcd10.dtb"
+        environment="${PRODUCT_OUT}dra7-evm-lcd7.dtb"
 fi
 
 # Create the filename