anv: Put MOCS in the correct location
My patch to switch from struct-based MOCS to numeric MOCS accidentally divided all MOCS entries by 2 in the Vulkan driver.
MOCS on Gen9+ is just an array index into a table. But in the hardware packets, the index starts at bit 1. So we need to shift it.
Fixes: 0b44644c (genxml: Consistently use a numeric "MOCS" field)