docs: gpu: fix typo

Signed-off-by: NJianhui Zhao <zhaojh329@gmail.com>
Signed-off-by: NSimon Ser <contact@emersion.fr>
Link: https://patchwork.freedesktop.org/patch/msgid/20210308064250.3681707-1-zhaojh329@gmail.com

Documentation/gpu/todo.rst

@@ -656,7 +656,7 @@ Outside DRM
 Convert fbdev drivers to DRM
 ----------------------------
 
-There are plenty of fbdev drivers for older hardware. Some hwardware has
+There are plenty of fbdev drivers for older hardware. Some hardware has
 become obsolete, but some still provides good(-enough) framebuffers. The
 drivers that are still useful should be converted to DRM and afterwards
 removed from fbdev.