MIPS: fix types u64 and __u64 to unsigned long long

Linux MIPS uses asm-generic/int-ll64.h in asm/types.h.
Thus u64 and __u64 are defined as unsigned long long. Port this
over to U-Boot.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
malta: correct tcl script path in README.malta

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>
Merge branch 'master' of git://git.denx.de/u-boot-mips