uboot-phytec

nds32: fix unused pmu_init warning

Fixes the build-time warning:
	board.c: At top level:
	board.c:106: warning: 'pmu_init' defined but not used

This makes the ifdef logic at the call site match the logic at the
function definition.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>