M1 GPU Driver: use "Apple AGX GPU driver" as the title

As discussed, rename the title and filename to one that does not refer
to M1 in particular, so that it is more stable over time.

Signed-off-by: Miguel Ojeda <ojeda@kernel.org>

Author: ojeda

SUMMARY.md

@@ -31,7 +31,7 @@
   - [Null Block Driver](Null-Block-Driver.md)
   - [Android Binder Driver](Android-Binder-Driver.md)
   - [PuzzleFS filesystem driver](PuzzleFS-filesystem-driver.md)
-  - [Apple M1 GPU Driver](M1-GPU-Driver.md)
+  - [Apple AGX GPU driver](Apple-AGX-GPU-driver.md)
 
 # Links
 

src/M1-GPU-Driver.md renamed to src/Apple-AGX-GPU-driver.md

@@ -1,7 +1,7 @@
-# M1 GPU Driver
+# Apple AGX GPU driver
 
 As part of the [Asahi Linux](https://asahilinux.org/about/) project, the Apple
-M1 GPU driver has been implemented in Rust for the Linux kernel, along with
+AGX GPU driver has been implemented in Rust for the Linux kernel, along with
 creating DRM bindings and associated userspace pieces.
 
 The driver lives [here](https://github.com/AsahiLinux/linux/tree/bits/210-gpu).