gpio: 104-dio-48e: Fix coding style issues

Fixed multiple bare uses of 'unsigned' without 'int'.
Fixed space around "*" operator.
Fixed function parameter alignment to opening parenthesis.
Reported by checkpatch.

Signed-off-by: Barney Goette <barneygoette@gmail.com>
Acked-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>