staging: sm750fb: remove duplicate from fb_videomode

As suggested by Sudip this patch removes the redundant 1360x768@60
option from the fb_videomode struct array.
The removed option and the option one it differ in a typo and a flag.

Signed-off-by: Michel von Czettritz <michel.von.czettritz@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>