mfd: Constify struct mfd_cell where possible

As of commit 03e361b25e ("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>

drivers/mfd/asic3.c

@@ -695,7 +695,7 @@ static int ds1wm_disable(struct platform_device *pdev)
 	return 0;
 }
 
-static struct mfd_cell asic3_cell_ds1wm = {
+static const struct mfd_cell asic3_cell_ds1wm = {
 	.name          = "ds1wm",
 	.enable        = ds1wm_enable,
 	.disable       = ds1wm_disable,
@@ -797,7 +797,7 @@ static int asic3_mmc_disable(struct platform_device *pdev)
 	return 0;
 }
 
-static struct mfd_cell asic3_cell_mmc = {
+static const struct mfd_cell asic3_cell_mmc = {
 	.name          = "tmio-mmc",
 	.enable        = asic3_mmc_enable,
 	.disable       = asic3_mmc_disable,