staging: board: line over 80 characters

This patch fixes the checkpatch.pl warning:

WARNING: line over 80 characters
+   .domain         = "/system-controller@e6180000/pm-domains/c5/a4lc@1"
Signed-off-by: Nikita Eshkeev <kastolom@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>