[Blackfin] arch: declare default INSTALL_PATH for Blackfin ports

Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>

authored by Mike Frysinger and committed by Bryan Wu 16e6da4f 6e668936

+1
+1
arch/blackfin/Makefile
··· 119 $(Q)$(MAKE) $(clean)=$(boot) 120 121 122 boot := arch/$(ARCH)/boot 123 BOOT_TARGETS = vmImage 124 PHONY += $(BOOT_TARGETS) install
··· 119 $(Q)$(MAKE) $(clean)=$(boot) 120 121 122 + INSTALL_PATH ?= /tftpboot 123 boot := arch/$(ARCH)/boot 124 BOOT_TARGETS = vmImage 125 PHONY += $(BOOT_TARGETS) install