regulator: palmas: Fix SMPS enable/disable/is_enable for tps65917

We use regmap regulator ops to enable/disable and check if regulator
is enabled for various SMPS. However, these depend on valid
enable_reg, enable_mask and enable_value in regulator descriptor.

So, similar to fix we did in commit 318dbb02
("regulator: palmas: Fix SMPS enable/disable/is_enabled"), populate the
same for TPS65917 SMPS registration. LDO definitions are already in
place.

Fixes: d6f83370 ("regulator: palmas: Add tps65917 PMIC support")
Signed-off-by: Nishanth Menon <nm@ti.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
Tested-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Mark Brown <broonie@linaro.org>