regulator: twl: Remove TWL6030_FIXED_RESOURCE

TWL6030_FIXED_RESOURCE is not used now, remove it.

TWL6030_FIXED_RESOURCE is not used since commit e76ab829
"regulator: twl: Remove references to the twl4030 regulator"

twl6030_fixed_resource is removed by commit 029dd3ce


"regulator: twl: Remove another unused variable warning".

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>