drm: replace strcpy() with strscpy()

To prevent errors from occurring when the src string is longer than the
dst string in strcpy(), we should use strscpy() instead.  This approach
also facilitates future extensions to the task comm.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Yafang Shao <[email protected]>
Suggested-by: Justin Stitt <[email protected]>
Acked-by: Daniel Vetter <[email protected]>
Reviewed-by: Justin Stitt <[email protected]>
Cc: Maarten Lankhorst <[email protected]>
Cc: Maxime Ripard <[email protected]>
Cc: Thomas Zimmermann <[email protected]>
Cc: David Airlie <[email protected]>
Cc: Alejandro Colomar <[email protected]>
Cc: Alexander Viro <[email protected]>
Cc: Alexei Starovoitov <[email protected]>
Cc: Andy Shevchenko <[email protected]>
Cc: Catalin Marinas <[email protected]>
Cc: Christian Brauner <[email protected]>
Cc: Eric Biederman <[email protected]>
Cc: Eric Paris <[email protected]>
Cc: James Morris <[email protected]>
Cc: Jan Kara <[email protected]>
Cc: Kees Cook <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Matthew Wilcox <[email protected]>
Cc: Matus Jokay <[email protected]>
Cc: Ondrej Mosnacek <[email protected]>
Cc: Paul Moore <[email protected]>
Cc: Quentin Monnet <[email protected]>
Cc: "Serge E. Hallyn" <[email protected]>
Cc: Simon Horman <[email protected]>
Cc: Stephen Smalley <[email protected]>
Cc: Steven Rostedt (Google) <[email protected]>
Cc: Tetsuo Handa <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

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