iio: magn: mmc5633: Fix Kconfig for combination of I3C as module and driver builtin

iio: magn: mmc5633: Fix Kconfig for combination of I3C as module and driver builtin

Fix based on similar fix in:
commit 83b645ee43f7 ("hwmon: tmp108: fix I3C dependency")

Note to keep things simple I'm now requiring I2C.
That can probably be relaxed in future, but I want to reduce the test
set of builds for now given this is blocker for the main IIO pull request.

Fixes: e559c8641460 ("iio: magn: mmc5633: Ensure REGMAP_I2C / I3C not build if I2C / I3C is not.")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202601310904.DueZdiuY-lkp@intel.com/
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>