regmap: mmio: Fix rebase error

A dangling pointless "ret 0" was left in and some unneeded
whitespace can go too.

Fixes: 81c0386c ("regmap: mmio: Support accelerared noinc operations")
Reported-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20220831141303.501548-1-linus.walleij@linaro.org


Signed-off-by: Mark Brown <broonie@kernel.org>