regulator: of: Fix kerneldoc format for of_regulator_bulk_get_all()

regulator: of: Fix kerneldoc format for of_regulator_bulk_get_all()

of_regulator_bulk_get_all() has a comment section that pretty much
resembles a kerneldoc block, except that the block begins with "/*"
instead of "/**".

Fix that and also rework the "Return" section and the error code
terminology so that it is the same as the other kerneldoc blocks
in the same file.

Fixes: 27b9ecc7a9ba ("regulator: Add of_regulator_bulk_get_all")
Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
Reported-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://patch.msgid.link/20240829085131.1361701-10-wenst@chromium.org
Signed-off-by: Mark Brown <broonie@kernel.org>