Revert "Revert "Revert "fix gpu not fully blasting"""

This reverts commit 114045ca7bbcaf2e21f3b0d4efda1c17f9b63424.
Revert "Revert "Revert "gpu: fix wrong nominal frequency introduced by the 480mhz slot"""

This reverts commit 78c03365639664e21767022e5da9b19c55d9e064.
Revert "Revert "Revert "GPU 3D: Overclock: Add 480Mhz slot - controllable via sysfs"""

This reverts commit 7ef1135857dc4b902d3b4d312ba6b47ec266e128.