i965/fs: Pass the compression mode to brw_reg_from_fs_reg().
i965/fs: Pass the compression mode to brw_reg_from_fs_reg().

Curro is planning to eliminate p->compressed, so let's avoid using it
here and just pass in the value directly.

Signed-off-by: Kenneth Graunke <bd2562f754ec92342f93f61c25d731e290a2ffa8@whitecape.org>
[ Francisco Jerez: Pass boolean flag instead of brw_compression enum. ]
Reviewed-by: Francisco Jerez <5906ff32bdd9fd8db196f6ba5ad3afd6f9257ea5@riseup.net>
Reviewed-by: Jason Ekstrand <68c46a606457643eab92053c1c05574abb26f861@jlekstrand.net>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler