Fix bug that exists in kernel.org since 2.6.17rc4 - compiles fail if
CONFIG_SERIAL_CPM_SMC is defined.  Tested on a board using SMC1 console.
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>