video: ssd1307fb: Drop OF dependency

After the commit 72915994 ("video: ssd1307fb: Make use of device
properties") driver does not depend on OF, drop unneeded dependency.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20210409164140.17337-1-andriy.shevchenko@linux.intel.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/video/fbdev/Kconfig

@@ -2209,7 +2209,6 @@ config FB_SIMPLE
 config FB_SSD1307
 	tristate "Solomon SSD1307 framebuffer support"
 	depends on FB && I2C
-	depends on OF
 	depends on GPIOLIB || COMPILE_TEST
 	select FB_SYS_FOPS
 	select FB_SYS_FILLRECT