Input: tm2-touchkey - drop of_match_ptr for ID table

The driver will match mostly by DT table (even thought there is regular
ID table) so there is little benefit in of_match_ptr (this also allows
ACPI matching via PRP0001, even though it might not be relevant here).
This also fixes !CONFIG_OF error:

  drivers/input/keyboard/tm2-touchkey.c:335:34: error: ‘tm2_touchkey_of_match’ defined but not used [-Werror=unused-const-variable=]
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230312131514.351603-2-krzysztof.kozlowski@linaro.orgSigned-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/keyboard/tm2-touchkey.c

@@ -354,7 +354,7 @@ static struct i2c_driver tm2_touchkey_driver = {
 	.driver = {
 		.name = TM2_TOUCHKEY_DEV_NAME,
 		.pm = pm_sleep_ptr(&tm2_touchkey_pm_ops),
-		.of_match_table = of_match_ptr(tm2_touchkey_of_match),
+		.of_match_table = tm2_touchkey_of_match,
 	},
 	.probe_new = tm2_touchkey_probe,
 	.id_table = tm2_touchkey_id_table,