Makefile: fix version string in "make setver-*"

Fix version string in "make setver" (doubled "v").

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

Makefile

@@ -104,6 +104,6 @@ upload-%:
 
 # Write board ID/revision to flash
 setver-%:
-	$(FLASHMAX) --setver 'MAX80 v$*'
+	$(FLASHMAX) --setver 'MAX80 $*'
 
 endif