MIPS: Makefile: Add simple make install target.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/Makefile

@@ -720,11 +720,17 @@ ifdef CONFIG_MIPS32_O32
 	$(Q)$(MAKE) $(build)=. missing-syscalls EXTRA_CFLAGS="-mabi=32"
 endif
 
+install:
+	$(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE)
+	$(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE)
+	$(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE)
+
 archclean:
 	@$(MAKE) $(clean)=arch/mips/boot
 	@$(MAKE) $(clean)=arch/mips/lasat
 
 define archhelp
+	echo '  install              - install kernel into $(INSTALL_PATH)'
 	echo '  vmlinux.ecoff        - ECOFF boot image'
 	echo '  vmlinux.bin          - Raw binary boot image'
 	echo '  vmlinux.srec         - SREC boot image'