leds: leds-st1202: Spacing and proofreading editing

Minor edits regarding use of spacing and proofreading.

There is a minor inconsistency in the use of spacing as margin in
one of the comments providing details about the datasheet.

There is also a typo that comes from the datasheet itself.

Change spacing on comment and correct typo.

Signed-off-by: Manuel Fombuena <fombuena@outlook.com>
Link: https://lore.kernel.org/r/CWLP123MB547333EFFFBFFA840225BC02C5C22@CWLP123MB5473.GBRP123.PROD.OUTLOOK.COM


Signed-off-by: Lee Jones <lee@kernel.org>