ART: Fix typo in IsCallerSave

Correctly refer to floating point registers, if necessary. This
ensures that we correctly start allocating caller-save FPRs.

Bug: 31275200
Test: ART_TEST_OPTIMIZING_GRAPH_COLOR=true m test-art-host
Change-Id: I420b66f0a000636e8370c739003de3cf53af3e30
1 file changed