media: CEC: keep related menu entries together

Keep all of the CEC menu items grouped together.
By grouping all of these menu entries inside a menu/endmenu block,
they are forced to be kept together and they are displayed/presented
in a group for users.

Tested with xconfig, gconfig, menuconfig, and nconfig.

Fixes: 46d2a3b964dd ("media: place CEC menu before MEDIA_SUPPORT")
Signed-off-by: Randy Dunlap <[e-mail]>
Signed-off-by: Hans Verkuil <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

drivers/media/cec/Kconfig

···
 config CEC_PIN
 	bool
 
+menu "CEC support"
+
 config MEDIA_CEC_RC
 	bool "HDMI CEC RC integration"
 	depends on CEC_CORE && RC_CORE
···
 source "drivers/media/cec/platform/Kconfig"
 source "drivers/media/cec/usb/Kconfig"
 endif
+
+endmenu