i965/gen9: use an unreserved surface alignment value
i965/gen9: use an unreserved surface alignment value

Although the horizontal and vertical alignment fields are ignored here,
0 is a reserved value for them and may cause undefined behavior. Change
the default value to an abitrary valid one.

v2: add comment about chosen value (Topi).

Reviewed-by: Anuj Phogat <e2026475996c48f0b97fd37e84129b3912980428@gmail.com>
Signed-off-by: Nanley Chery <d78cd5d33e98a5581566f188959f731bd0b1c0fd@intel.com>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler