Remove MK_STR from places that consume CONFIG_BOOTFILE to force all definitions to be string literals.
Signed-off-by: NJoe Hershberger <joe.hershberger@ni.com>
Cc: Joe Hershberger <joe.hershberger@gmail.com>
Cc: Wolfgang Denk <wd@denx.de>
Acked-by: NMike Frysinger <vapier@gentoo.org>