i2c: i2c-scmi: Drop unused ACPI_MODULE_NAME definition

The ACPI_MODULE_NAME() definition is only used by the message
printing macros from ACPICA that are not used by the code in
question, so it is redundant.  Drop it.

No functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>