leds: platform data: add -rgb1 suffix to button backlight

makes my life easier

Signed-off-by: Michael Bestas <mikeioannina@gmail.com>

Change-Id: I6ea98222c8db2cb398a03336304d77edb57589e7
Merge pull request #2 from LegacyXperia/cm-10.1

leds: platform data: add -rgb1 suffix to button backlight