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

dev_err macros expect const struct device ** as its second
argument, but here the argument we are passing is of typ
struct device **. This patch fixes this error.

Fixes: 454b0ec8 ("Staging: fsl-mc: Replace pr_err with dev_err")
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>