staging: sm750fb: split multiple assignments to lines

Adhere to Linux kernel coding style.

Reported by checkpatch:

CHECK: multiple assignments should be avoided

Signed-off-by: Christopher Carbone <chris.m.carbone@gmail.com>
Link: https://lore.kernel.org/r/YwVBHM3z0QExtuXr@valhalla


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