PPC32: Export flush_tlb_page.

From Michel Daenzer <michel@daenzer.net>.

arch/ppc/kernel/ppc_ksyms.c

@@ -200,6 +200,7 @@ EXPORT_SYMBOL(flush_dcache_range);
 EXPORT_SYMBOL(flush_icache_user_range);
 EXPORT_SYMBOL(flush_dcache_page);
 EXPORT_SYMBOL(flush_tlb_kernel_range);
+EXPORT_SYMBOL(flush_tlb_page);
 #ifdef CONFIG_ALTIVEC
 EXPORT_SYMBOL(last_task_used_altivec);
 EXPORT_SYMBOL(giveup_altivec);