MIPS: Convert __syscall_error() callers to use $a0 for argument
Some callers passed the first argument in $v0, while others used $a0.
Change the callers to use $a0 consistently.
Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>