iio: magn: mmc5633: Ensure REGMAP_I2C / I3C not build if I2C / I3C is not.

iio: magn: mmc5633: Ensure REGMAP_I2C / I3C not build if I2C / I3C is not.

Fixes the following build warning (and equivalent I2C one)
WARNING: unmet direct dependencies detected for REGMAP_I3C
  Depends on [n]: I3C [=n]
  Selected by [m]:
  - MMC5633 [=m] && IIO [=y] && (I2C [=y] || I3C [=n])

Fixes: 6e5f6bf2e3f0 ("iio: magnetometer: Add mmc5633 sensor")
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>