nt 2b8aea74e78e977b1f9987e23e3e59f3ef4359f4
author Chris Zankel <chris@zankel.net> 1186338253 -0700
committer Chris Zankel <chris@zankel.net> 1188248026 -0700

[XTENSA] Add typecast macro for constants

Add macros (__XTENSA_UL and __XTENSA_UL_CONST) for typecasting
constants.

Signed-off-by: Chris Zankel <chris@zankel.net>
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