regulator: tps65217: remove tps65217.dtsi file

remove tps65217.dtsi and adapt all boards, which
used it.

Signed-off-by: Heiko Schocher <hs@denx.de>
Tested-by: Keerthy <j-keerthy@ti.com>
Acked-by: Mark Brown <broonie@kernel.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>