Make ARMv7 work again

Make ARMv7 work again
https://bugs.webkit.org/show_bug.cgi?id=81157

Reviewed by Geoffrey Garen.

We were trying to use the ARMv7 dataRegister as a scratch register in a scenario
where we the ARMv7MacroAssembler would also try to use dataRegister for its own
nefarious purposes.

* assembler/MacroAssembler.h:
(JSC::MacroAssembler::store32):
* assembler/MacroAssemblerARMv7.h:
(MacroAssemblerARMv7):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@110751 268f45cc-cd09-0410-ab3c-d52691b4dbfc