nvc0: Fix global memory setup for nvc0:nve4

This commit fixes the dmesg error : nouveau E[   PFIFO][0000:01:00.0]
SUBFIFO0: ch 3 [glxgears[4486]] subc 0 mthd 0x0000 data 0x00000000
nvc0: Fix xonotic bug

And remove 'bind parameters buffer setup' which generates the dmesg
error : nouveau E[  PGRAPH][0000:01:00.0] DATA_ERROR [INVALID_BITFIELD]
ch 3 [0x003fac5000 glxgears[6458]] subc 1 class 0x90c0 mthd 0x2380 data
0x02020000