mfd: marvell: Constify struct mfd_cell where possible

As of commit 03e361b25ee8dfb1fd9b890072c23c4aae01c6c7 ("mfd: Stop setting
refcounting pointers in original mfd_cell arrays"), the "cell" parameter of
mfd_add_devices() is "const" again. Hence make all cell data passed to
mfd_add_devices() const where possible.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
diff --git a/drivers/mfd/88pm805.c b/drivers/mfd/88pm805.c
index 8a5b6ff..64751c2 100644
--- a/drivers/mfd/88pm805.c
+++ b/drivers/mfd/88pm805.c
@@ -77,7 +77,7 @@
 	 },
 };
 
-static struct mfd_cell codec_devs[] = {
+static const struct mfd_cell codec_devs[] = {
 	{
 	 .name = "88pm80x-codec",
 	 .num_resources = ARRAY_SIZE(codec_resources),