video: fbdev: atyfb: mach64_cursor.c: deleted the repeated word

deleted the repeated word 'be' in the comments.

Signed-off-by: lijian <[e-mail]>
Signed-off-by: Daniel Vetter <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/video/fbdev/aty/mach64_cursor.c

···
  * The Screen position of the top left corner of the displayed
  * cursor is specificed by CURS_HORZ_VERT_POSN. Care must be taken
  * when the cursor hot spot is not the top left corner and the
- * physical cursor position becomes negative. It will be be displayed
+ * physical cursor position becomes negative. It will be displayed
  * if either the horizontal or vertical cursor position is negative
  *
  * If x becomes negative the cursor manager must adjust the CURS_HORZ_OFFSET