staging: sm750fb: Fix lines over 80 characters

Fix lines over 80 character warnings. Issue found
by checkpatch.

Signed-off-by: Jamal Shareef <jamal.k.shareef@gmail.com>
Link: https://lore.kernel.org/r/1f635b0469f93d8460d513f5fabd877dc5054a33.1571108943.git.jamal.k.shareef@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>