i965/fs: Use unsigned for CS/VS atomics pixel mask immediate data
i965/fs: Use unsigned for CS/VS atomics pixel mask immediate data

brw_imm_ud(0xffff) should have been converted to fs_reg(0xffffu) to
make sure the uint32_t fs_reg constructor was matched.

commit 49a938a265f5959c9b558995cc658f80acb6eb18
Author: Jordan Justen <a79006884ba9cf5f4f7fcbb92a15b208780d8c97@intel.com>
Date:   Fri Feb 20 12:12:25 2015 -0800
    i965/fs: Use fs_reg for CS/VS atomics pixel mask immediate data

Signed-off-by: Jordan Justen <a79006884ba9cf5f4f7fcbb92a15b208780d8c97@intel.com>
Reviewed-by: Matt Turner <789b315743a28dd066a4ba1459c35951c291d8a6@gmail.com>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler