staging: sm7xxfb: copy device name before we pass to the smtc_alloc_fb_info

the name is not initialised and passed to the function smtc_alloc_fb_info
and copies the name into a member of fb structure.

copy the name before calling alloc_fb_info.

Signed-off-by: Devendra Naga <devendra.aaru@gmail.com>
Acked-by: Javier Muñoz <jmunhoz@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>