menu: remove CTRL+C to quit

On the sandbox called without "--terminal raw" CTRL+C leaves U-Boot,
"ESC/CTRL+C to quit" is misleading.

Let's remove CTRL+C to quit key handling from bootmenu and eficonfig menu.

Signed-off-by: Masahisa Kojima <masahisa.kojima@linaro.org>
Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
3 files changed