MIPS: black-swift: skip pbl lowlevel init if running from RAM
Black Swift has 16 MiB flash boot ROM. The standard board's
bootloader (U-Boot_mod) remaps boot ROM to 0xbf000000.
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Tested-by: Yegor Yefremov <yegorslists@googlemail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>