media: input: serio.h: add SERIO_EXTRON_DA_HD_PLUS

Add a new serio ID for the Extron DA HD 4K Plus series of 4K HDMI
Distribution Amplifiers. These devices support CEC over the serial
port, so a new serio ID is needed to be able to associate the CEC
driver.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

Author: Hans Verkuil

include/uapi/linux/serio.h

@@ -83,5 +83,6 @@
 #define SERIO_PULSE8_CEC	0x40
 #define SERIO_RAINSHADOW_CEC	0x41
 #define SERIO_FSIA6B	0x42
+#define SERIO_EXTRON_DA_HD_4K_PLUS	0x43
 
 #endif /* _UAPI_SERIO_H */