regulator: s2mps11: Fix the voltage linear range for s2mps15

This patch fixes some of the LDOs and BUCKs voltage range as per
user manual of s2mps15 (REV0.4).

Fixes: 51af2067

 ("regulator: s2mps11: Add support for S2MPS15 regulators")
Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: <stable@vger.kernel.org>