Since valgrind does not build for powerpc soft-float, disable it from
the tools-profile packagegroup so that it can still be enabled for such
architectures (but without valgrind of course).
(From OE-Core rev: ad78ff1c362ecc281c797ce3bb083e532a0bb483)
Signed-off-by: Valentin Longchamp <valentin@longchamp.me>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>