The Marvell Bluetooth driver has debugfs support and they are casting
like there is no tomorrow. Remove all of them and magically the code
becomes more readable.
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

/debug/btmrvl/config/
/debug/btmrvl/status/

See Documentation/btmrvl.txt for details.

This patch incorporates a lot of comments given by
Nicolas Pitre <nico@marvell.com>. Many thanks to Nicolas Pitre.
Signed-off-by: NRahul Tank <rahult@marvell.com>
Signed-off-by: NBing Zhao <bzhao@marvell.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>