Since most boards now use the same generic device config header, move its
setup to SoC Kconfig instead of setting SYS_CONFIG_NAME in each board's
Kconfig.

Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>

Most device headers contain SoC specific part and common Tegra post part.
Add a generic header which can be used by any Tegra device of one of the
supported SoC generations (T20, T30, T114, T124 or T210) without need in
device specific configuration.

Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>

Convert CFG_TEGRA_BOARD_STRING into Kconfig option and move it into device
board Kconfig.

Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>

Assorted Tegra enhancements. Merged with the recent XPL_BUILD changes,
resolve some whitespace issues and fix the name of the new apalis-tk1
env file by Tom.

Signed-off-by: Tom Rini <trini@konsulko.com>

Convert boards to use text based env. This is the first stage of
conversion, common inclusions should be converted next.

Acked-by: Francesco Dolcini <francesco.dolcini@toradex.com> # Toradex Apalis TK1
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>

Use the new symbol to refer to any 'SPL' build, including TPL and VPL

Signed-off-by: Simon Glass <sjg@chromium.org>

WEXLER Tab 7t is a mini tablet computer developed by WEXLER that
runs the Android operating system. The device features a 7.0-inch
(180 mm) HD display, an Nvidia Tegra 3 quad-core chip, 1 GB of RAM,
8, 16 or 32 GB of storage that can be supplemented with a microSDXC
card giving up to 64 GB of additional storage and a full size USB
port.

Tested-by: Maksim Kurnosenko <asusx2@mail.ru>
Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>