Revert "Disable GL_NV_shader_noperspective_interpolation on PowerVR"
Revert "Disable GL_NV_shader_noperspective_interpolation on PowerVR"

This reverts commit 9dd63710f11af7e10d5604874f89bea66b8b9d32.

Reason for revert: The actual issue was related to cached shaders recorded on a different device. No evidence of actual driver bug.

Original change's description:
> Disable GL_NV_shader_noperspective_interpolation on PowerVR
>
> There's probably a more specific check we could use, but we're seeing
> shaders fail to compile when enabling this extension on some MediaTek
> devices.
>
> Bug: b/177473804
> Change-Id: Ic91f60c6935386f44d9386c362e9f778c28a4099
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/460576
> Reviewed-by: Robert Phillips <robertphillips@google.com>
> Commit-Queue: Brian Osman <794c0b5534edf5601d88e1d41975d0262da12894@google.com>

Bug: b/177473804
Change-Id: Iea36dd74a2a530f8347517bee76d83ceacc262a0
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/463057
Bot-Commit: Rubber Stamper <d516c4cc2192058ab8dae3d306acbdaf2ce6574f@appspot.gserviceaccount.com>
Commit-Queue: Brian Osman <794c0b5534edf5601d88e1d41975d0262da12894@google.com>

google/skia,google/skia,google/skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,google/skia,aosp-mirror/platform_external_skia,google/skia,google/skia,aosp-mirror/platform_external_skia,google/skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,google/skia,google/skia,google/skia