gpiolib: Join string literals back

For easy grepping on debug purposes join string literals back in the
messages.

While here, fix couple of small indentation issues.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
1 file changed