i965/blorp: Let compiler calculate the vertex buffer size
i965/blorp: Let compiler calculate the vertex buffer size

Currently the size is sizeof(float) times too large. One reserves
GEN6_BLORP_VBO_SIZE many floats whereas GEN6_BLORP_VBO_SIZE stands
for the size of vertex buffer in bytes.

Signed-off-by: Topi Pohjolainen <749697f19798b7f640b17221fd283b903825f071@intel.com>
Reviewed-by: Kenneth Graunke <bd2562f754ec92342f93f61c25d731e290a2ffa8@whitecape.org>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler