Revert "regulator: tps65217: remove tps65217.dtsi file"

Revert "regulator: tps65217: remove tps65217.dtsi file"

This reverts commit f7a9bd17d269b40b7d0c87e9d59bc1b7e0d89804.

Without the patch reverted regulators will not work. This prevents
MMC to be working for example so the boards can not boot to
MMC rootfs.

Tested it on beaglebone white and bisect also points to the
reverted commit.
The issue can be also fixed by adding "regulator-compatible =" to all board
dts file for the regulators.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>