staging: sm750fb: Fix parameter mistake in poke32

In commit c075b6f2 ("staging: sm750fb: Replace POKE32 and PEEK32
by inline functions"), POKE32 has been replaced by the inline function
poke32. But it exchange the "addr" and "data" parameters by mistake, so
fix it.

Fixes: c075b6f2 ("staging: sm750fb: Replace POKE32 and PEEK32 by inline functions"),
Signed-off-by: Huacai Chen <chenhc@lemote.com>
Signed-off-by: Liangliang Huang <huangll@lemote.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>