[WATCHDOG] Fix return value warning in hpwdt

The return value of smbios_scan_machine() is never used, and when it
succeeds it doesn't return anything, so just make it void.  This fixes:

    drivers/watchdog/hpwdt.c: In function 'smbios_scan_machine':
    drivers/watchdog/hpwdt.c:562: warning: control reaches end of non-void function
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Acked-by: Thomas Mingarelli <Thomas.Mingarelli@hp.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

drivers/watchdog/hpwdt.c

@@ -528,20 +528,19 @@ static int __devinit smbios_present(const char __iomem *p)
 	return -ENODEV;
 }
 
-static int __devinit smbios_scan_machine(void)
+static void __devinit smbios_scan_machine(void)
 {
 	char __iomem *p, *q;
-	int rc;
 
 	if (efi_enabled) {
 		if (efi.smbios == EFI_INVALID_TABLE_ADDR)
-			return -ENODEV;
+			return;
 
 		p = ioremap(efi.smbios, 32);
 		if (p == NULL)
-			return -ENOMEM;
+			return;
 
-		rc = smbios_present(p);
+		smbios_present(p);
 		iounmap(p);
 	} else {
 		/*
@@ -549,14 +548,12 @@ static int __devinit smbios_scan_machine(void)
 		 */
 		p = ioremap(PCI_ROM_BASE1, ROM_SIZE);
 		if (p == NULL)
-			return -ENOMEM;
+			return;
 
-		for (q = p; q < p + ROM_SIZE; q += 16) {
-			rc = smbios_present(q);
-			if (!rc) {
+		for (q = p; q < p + ROM_SIZE; q += 16)
+			if (!smbios_present(q))
 				break;
-			}
-		}
+
 		iounmap(p);
 	}
 }