Ensure that the touchscreen response has correct "report id" byte
before processing the touch data and discard other messages.

Fixes: 42370681 ("Input: Add support for ILITEK Lego Series")
Signed-off-by: Emanuele Ghidoli <emanuele.ghidoli@toradex.com>
Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
Link: https://lore.kernel.org/r/20240805085511.43955-3-francesco@dolcini.itSigned-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>