build: add image command for installing zImage file.

Signed-off-by: Sandeep Sheriker Mallikarjun <sandeepsheriker.mallikarjun@microchip.com>

include/image-commands.mk

@@ -114,6 +114,11 @@ define Build/install-dtb
 	)
 endef
 
+define Build/install-zImage
+    $(CP) $(KDIR)/zImage \
+      $(BIN_DIR)/$(IMG_PREFIX)-$(PROFILE_SANITIZED)-zImage
+endef
+
 define Build/fit
 	$(TOPDIR)/scripts/mkits.sh \
 		-D $(DEVICE_NAME) -o $@.its -k $@ \