video: fbdev: kconfig: Add help text to FB_I810_I2C

The FB_I810_I2C symbol previously had a blank help text, which was
removed in e9829ac4 ("video: fbdev: kconfig: Remove blank help
text").

Give it a proper help text, derived from commit 74f6ae84 ("[PATCH]
i810fb: Add > i2c/DDC support").
Signed-off-by: NUlf Magnusson <ulfalizer@gmail.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: "Luis R . Rodriguez" <mcgrof@kernel.org>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Paul Bolle <pebolle@tiscali.nl>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Michal Simek <michal.simek@xilinx.com>
Cc: Hans de Goede <j.w.r.degoede@gmail.com>
Signed-off-by: NBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>

drivers/video/fbdev/Kconfig

@@ -1156,6 +1156,11 @@ config FB_I810_I2C
 	bool "Enable DDC Support"
 	depends on FB_I810 && FB_I810_GTF
 	select FB_DDC
+	help
+	  Add DDC/I2C support for i810fb.  This will allow the driver to get
+	  display information, especially for monitors with fickle timings.
+
+	  If unsure, say Y.
 
 config FB_LE80578
 	tristate "Intel LE80578 (Vermilion) support"