MarsSeed [1] filed a deletion request for mipsel-ps2-elf-binutils [2]:

Broken old component from 4 years ago of the gnu cross compiler
toolchain for MIPSEL.

The 'ps2' fork is discontinued for 4 years. [a]
It was the vanilla copy of upstream, with no custom patches added.

Not useful to keep this package. AUR has working packages for the
mipsel cross-compiler toolchain, with different versions of gcc
available for this target. Those can be used to for the PS2 as well.

[a]: https://github.com/ps2dev/binutils-gdb

[1] https://aur.archlinux.org/account/MarsSeed/
[2] https://aur.archlinux.org/pkgbase/mipsel-ps2-elf-binutils/