README.malta referred to board/malta, but malta has now been moved
within board/imgtec/, so correct the path.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Daniel Schwierzeck <daniel.schwierzeck@googlemail.com>
Cc: Paul Burton <paul.burton@imgtec.com>

This patch adds a script which may be used with MIPS Navigator Console
and a MIPS Nagivator Probe in order to flash U-boot to a MIPS Malta
development board.

Please see the newly added doc/README.malta for usage instructions.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>