ARM: tegra: replace V_PROMPT define with kconfig

Commit 181bd9dc61d2 "kconfig: add config option for shell prompt" replaced
define V_PROMPT with Kconfig option SYS_PROMPT. This crossed with patches
adding Tegra T210 boards. Migrate the boards to the new scheme.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
8 files changed