nvmem: remove a stray newline

There are two empty lines between devm_nvmem_unregister() and
__nvmem_device_get(). Remove one.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>