v3d: implement simultaneous peripheral access exceptions for V3D 4.1+

v3d: implement simultaneous peripheral access exceptions for V3D 4.1+

Shader-db results:

total instructions in shared programs: 9117550 -> 9102719 (-0.16%)
instructions in affected programs: 1752873 -> 1738042 (-0.85%)
helped: 7076
HURT: 478
helped stats (abs) min: 1 max: 22 x̄: 2.19 x̃: 2
helped stats (rel) min: 0.07% max: 13.89% x̄: 1.70% x̃: 1.07%
HURT stats (abs)   min: 1 max: 7 x̄: 1.41 x̃: 1
HURT stats (rel)   min: 0.09% max: 10.17% x̄: 0.86% x̃: 0.54%
95% mean confidence interval for instructions value: -2.00 -1.92
95% mean confidence interval for instructions %-change: -1.58% -1.50%
Instructions are helped.

total max-temps in shared programs: 1327774 -> 1327728 (<.01%)
max-temps in affected programs: 1025 -> 979 (-4.49%)
helped: 47
HURT: 2
helped stats (abs) min: 1 max: 2 x̄: 1.02 x̃: 1
helped stats (rel) min: 2.63% max: 20.00% x̄: 7.67% x̃: 5.26%
HURT stats (abs)   min: 1 max: 1 x̄: 1.00 x̃: 1
HURT stats (rel)   min: 4.17% max: 4.17% x̄: 4.17% x̃: 4.17%
95% mean confidence interval for max-temps value: -1.06 -0.82
95% mean confidence interval for max-temps %-change: -8.89% -5.49%
Max-temps are helped.

Reviewed-by: Eric Anholt <eric@anholt.net>