hwmon: (lm75) Fix I3C transfer buffer pointer for incoming data

Use the I3C private transfer input buffer pointer for incoming data
instead of output buffer. For now this is harmless since both of those
pointers are union members but may confuse when reading the code.

Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Link: https://lore.kernel.org/r/20250513111739.508886-1-jarkko.nikula@linux.intel.com


Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>