regulator: as3722: Fix equation to calculate max_uV in regulator_lin_range macro

Fix off-by-one in the equation to calculate max_uV and also adjust the _min_uV
setting accordingly.

For LDOs:
The voltage select bits set the LDO output voltage 0.825V...3.3V, 25mV steps
  ....00h : LDO off
  01h-24h : V_LDO4 = 0.8V + ldo4_vsel * 25mV
                   = 0.825V + (ldo4_vsel - 1h) * 25mV
  25h-3Fh : do not use
  40h-7Fh : V_LDO4 = 1.725V + (ldo4_vsel - 40h) * 25mV

For SD2345:
The voltage select bits set the DC/DC output voltage level and power the DC/DC
converter down.
  ....00h : DC/DC powered down
  01h-40h : V_SD2 = 0.6V + sd2_vsel * 12.5mV
                  = 0.6125V + (sd2_vsel - 1h) * 12.5mV
  41h-70h : V_SD2 = 1.4V + (sd2_vsel - 40h) * 25mV
                  = 1.425V + (sd2_vsel - 41h) * 25mV
  71h-7Fh : V_SD2 = 2.6V + (sd2_vsel - 70h) * 50mV
                  = 2.65V + (sd2_vsel - 71h) * 50mV

Note, the third entry in as3722_sd2345_ranges is wrong in current code.
Fix it based on the datasheet.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

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