lima: do not set the PP uniforms address lowest bits

lima: do not set the PP uniforms address lowest bits

The PP uniforms address register in render state is not a direct pointer
to the uniforms storage -- instead, it points to an one-item array, and
the array item is the real pointer to the uniforms storage.

This register reuses some of its LSBs as a size field. Currently the
size is set according to the length of the real uniforms storage.
However, as the register itself contains only a pointer to the one-item
array, the size field should be set to the length of the one-item array
and subtract it by 1, which means a fixed value of 0. That means we can
just omit it now.

Test shows this should be the correct approach to set this register.

Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
Reviewed-by: Vasily Khoruzhick <anarsoul@gmail.com>