locore.S - two cosmetic changes

[Antonin Houska]

Hello,

while trying to understand the code, I've spotted two things that might need
to be improved - please see the attachments.

remove_useless_assignment.patch removes setting of register value which is not
used until the next value is set. use_constant_not_literal.patch probably
needs no explanation.

-- 
Antonín Houska
www.melesmeles.cz

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