parisc: Default to 16 CPUs on 32-bit kernel

Qemu currently supports up to 16 CPUs, so increase the default from 4 to 16.
Bload-o-meter shows only an increase of 800 bytes with this change.
Signed-off-by: Helge Deller <deller@gmx.de>

arch/parisc/Kconfig

@@ -356,7 +356,8 @@ config NR_CPUS
 	int "Maximum number of CPUs (2-32)"
 	range 2 32
 	depends on SMP
-	default "4"
+	default "4" if 64BIT
+	default "16"
 
 config KEXEC
 	bool "Kexec system call"