x86, smp: clean up mps_oem_check()

Impact: cleanup

 - allow NULL ->mps_oem_check() entries

 - clean up the code flow

Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/include/asm/genapic.h b/arch/x86/include/asm/genapic.h
index 14b19de..8bb1c73c 100644
--- a/arch/x86/include/asm/genapic.h
+++ b/arch/x86/include/asm/genapic.h
@@ -55,8 +55,7 @@
 	 * is switched to this. Essentially they are additional
 	 * probe functions:
 	 */
-	int (*mps_oem_check)(struct mpc_table *mpc, char *oem,
-			     char *productid);
+	int (*mps_oem_check)(struct mpc_table *mpc, char *oem, char *productid);
 
 	unsigned int (*get_apic_id)(unsigned long x);
 	unsigned long (*set_apic_id)(unsigned int id);