PR target/55565: update failing powerpc test

[Dominique Dhumieres]

Hi,

AFAIU the regexps, they are not doing what they are supposed to do
on powerpc-apple-darwin9: the assembly reads

	fmr f1,f0

i.e., fmr \[0-9\]+ or fmr 1 are never found.

If I use "fmr f?\[0-9\]+,f?\[0-9\]+", then the test fails,
in line with the other powerpc.
If I use "lfd \(f?\[0-9\]+\),\[^\n\r\]*\[\n\r\]+\[ \t]*fmr f?1,\\1\[\n\r\]+\[ \t]*blr"
the test passes.

Cheers,

Dominique

PS. IIRC some previous discussions around such darwin peculiarities
the f? decoration may be too simplistic to cover all the powerpc
flavors (A. Pinski may know better).