Input: elants_i2c - fix typo for an attribute to show calibration count

Fixed typo for command from 0xE0 to 0xD0.

Fixes: cf520c64 ("Input: elants_i2c - provide an attribute to show calibration count")
Signed-off-by: Johnny Chuang <johnny.chuang.emc@gmail.com>
Link: https://lore.kernel.org/r/1600238783-32303-1-git-send-email-johnny.chuang.emc@gmail.com


Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>