regulator: mt6358: Use unsigned int for volt_tables

The regulator_desc expects "const unsigned int *volt_table", thus use
unsigned int instead of u32.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Link: https://lore.kernel.org/r/20210606065052.1417111-1-axel.lin@ingics.com


Signed-off-by: Mark Brown <broonie@kernel.org>