MIPS: Loongson64: select NO_EXCEPT_FILL

Loongson64 load kernel at 0x82000000 and allocate exception vectors
by ebase. So we don't need to reserve space for exception vectors
at head of kernel.
Signed-off-by: NJiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: NThomas Bogendoerfer <tsbogend@alpha.franken.de>

arch/mips/Kconfig

@@ -462,6 +462,7 @@ config MACH_LOONGSON64
 	select ISA
 	select I8259
 	select IRQ_MIPS_CPU
+	select NO_EXCEPT_FILL
 	select NR_CPUS_DEFAULT_64
 	select USE_GENERIC_EARLY_PRINTK_8250
 	select PCI_DRIVERS_GENERIC