[Intel-gfx] [PATCH]fix for large texture with GEM-classic mode (bug#17964)

[Xiang, Haihao]

Hi, 
   Here are 2 patch for bug#17964. Sometimes a large texture(such as
2048x2048) works incorrectly under GEM-classic mode. There are two
problems. Firstly there is an endless loop in intelEmitCopyBlit when
using BLT to copy large texture image to mipmap tree. Secondly
aperture_check only counts the first 3 level BOs, 
The BO for texture is always ignored
(batchbuffer_BO->bind_table_BO->surface_states_BO->texture_BO). 


Thanks
Haihao
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