[Patch, ARM] rename thumb_unexpanded_epilogue to thumb1_unexpanded_epilogue

[Greta Yorsh]

Rename thumb_unexpanded_epilogue to thumb1_unexpanded_epilogue.

In preparation for epilogue generation in RTL and anyway it's the right name
for this function.

Ok for trunk?

Thanks,
Greta

gcc/ChangeLog

2012-04-24  Ian Bolton  <ian.bolton at arm.com>
            Sameera Deshpande  <sameera.deshpande at arm.com>
            Greta Yorsh  <greta.yorsh at arm.com>

        * config/arm/arm-protos.h (thumb_unexpanded_epilogue): Rename to...
        (thumb1_unexpanded_epilogue): ...this.
        * config/arm/arm.c (thumb_unexpanded_epilogue): Rename to...
        (thumb1_unexpanded_epilogue): ...this.
        * config/arm/arm.md (thumb_unexpanded_epilogue): Rename to...
        (thumb1_unexpanded_epilogue): ...this.
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