iio:accel:mxc4005: Drop unnecessary explicit casts in regmap_bulk_read calls

iio:accel:mxc4005: Drop unnecessary explicit casts in regmap_bulk_read calls

[ Upstream commit b01401a228bc4997b0d4bcb669fced448f7a15ca ]

regmap_bulk_read takes a void * for its val parameter. It certainly
makes no sense to cast to a (u8 *) + no need to explicitly cast
at all when converting another pointer type to void *.

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>