testing: nvdimm: iomap: add MODULE_DESCRIPTION()

Fix the 'make W=1' warning:

WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/nvdimm/../../tools/testing/nvdimm/test/iomap.o

Signed-off-by: Jeff Johnson <[email protected]>
Link: https://patch.msgid.link/r/[email protected]
Signed-off-by: Ira Weiny <[email protected]>

Author: Jeff Johnson

tools/testing/nvdimm/test/iomap.c

@@ -407,4 +407,5 @@ union acpi_object * __wrap_acpi_evaluate_dsm(acpi_handle handle, const guid_t *g
 }
 EXPORT_SYMBOL(__wrap_acpi_evaluate_dsm);
 
+MODULE_DESCRIPTION("NVDIMM unit test");
 MODULE_LICENSE("GPL v2");