Input: sur40 - convert le16 to cpu before use

Input: sur40 - convert le16 to cpu before use

Smatch found this issue:
drivers/input/touchscreen/sur40.c:424:55: warning: incorrect type in argument 2 (different base types)
drivers/input/touchscreen/sur40.c:424:55:    expected int key
drivers/input/touchscreen/sur40.c:424:55:    got restricted __le16 [usertype] blob_id

Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
Link: https://lore.kernel.org/r/20240410-smatch-v1-6-785d009a852b@chromium.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>