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

deleted the repeated word 'be' in the comments.
Signed-off-by: lijian <lijian@yulong.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20210601012747.38884-1-lijian_8010a29@163.com

drivers/video/fbdev/aty/mach64_cursor.c

@@ -46,7 +46,7 @@
  * 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