staging: fsl-mc: fix incorrect type passed to dev_dbg macros

dev_dbg macros expect const struct device ** as its second
argument but here the argument we are passing is of type
struct device ** this patch fixes this error.

Fixes: de71daf5 ("Staging: fsl-mc: Replace pr_debug with dev_dbg")
Cc: Bhumika Goyal <bhumirks@gmail.com>
Reported-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Cihangir Akturk <cakturk@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>