Fix copy'n'paste typo in commproc.c

The powerpc version of commproc.c exports cpm_dpram_addr twice and cpm_dpram_phys not at all due to a typo. This patch fixes this problem.

CC arch/powerpc/sysdev/commproc.o
arch/powerpc/sysdev/commproc.c:398: error: redefinition of '__kcrctab_cpm_dpram_addr' arch/powerpc/sysdev/commproc.c:392: error: previous definition of '__kcrctab_cpm_dpram_addr' was here arch/powerpc/sysdev/commproc.c:398: error: redefinition of '__kstrtab_cpm_dpram_addr' arch/powerpc/sysdev/commproc.c:392: error: previous definition of '__kstrtab_cpm_dpram_addr' was here arch/powerpc/sysdev/commproc.c:398: error: redefinition of '__ksymtab_cpm_dpram_addr' arch/powerpc/sysdev/commproc.c:392: error: previous definition of '__ksymtab_cpm_dpram_addr' was here make[1]: *** [arch/powerpc/sysdev/commproc.o] Error 1
make: *** [arch/powerpc/sysdev] Error 2

---
arch/powerpc/sysdev/commproc.c | 2 +-

1 files changed, 1 insertions(+), 1 deletions(-)

index 4f67b89..dd5417a 100644
@@ -395,4 +395,4 @@ uint cpm_dpram_phys(u8* addr)
 {
 	return (dpram_pbase + (uint)(addr - dpram_vbase));
 }
-EXPORT_SYMBOL(cpm_dpram_addr);
+EXPORT_SYMBOL(cpm_dpram_phys);