mach-snapdragon: move default environment to a file

Make use of CONFIG_DEFAULT_ENV_FILE and move the default qcom
environment to a file under board/qualcomm.

This is much cleaner and means we don't need to recompile on changing
the environment.

Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>
diff --git a/board/qualcomm/default.env b/board/qualcomm/default.env
new file mode 100644
index 0000000..dbf6f4e
--- /dev/null
+++ b/board/qualcomm/default.env
@@ -0,0 +1,11 @@
+stdin=serial,button-kbd
+stdout=serial,vidconsole
+stderr=serial,vidconsole
+preboot=scsi scan; usb start
+fastboot=fastboot -l $fastboot_addr_r usb 0
+do_boot=bootefi bootmgr
+bootmenu_0=Boot first available device=run do_boot
+bootmenu_1=Enable fastboot mode=run fastboot
+bootmenu_2=Reset device=reset
+menucmd=bootmenu
+bootcmd=run do_boot