[POWERPC] mpc52xx: fix compile error introduce when rebasing patch

When rebasing one of the mpc5200 psc UART patches I made a mistake and
damaged the patch.

This patch fixes the compile failure introduced in commit
25ae3a0739c69425a911925b43213895a9802b98

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
1 file changed