rust: samples: fix init argument

[Bruno-Eduardo]

I was trying to compile the rust_minimal for arm64 using asahi rust/kernel and found the following error:

$ make CROSS_COMPILE="aarch64-linux-gnu-" ARCH=arm64 LLVM=1 ./samples/rust/rust_minimal.o
  CALL    scripts/checksyscalls.sh
  RUSTC [M] samples/rust/rust_minimal.o
error[E0050]: method `init` has 1 parameter but the declaration in trait `kernel::Module::init` has 2
  --> /largeFiles/linux_asahi/samples/rust/rust_minimal.rs:20:22
   |
20 |     fn init(_module: &'static ThisModule) -> Result<Self> {
   |                      ^^^^^^^^^^^^^^^^^^^ expected 2 parameters, found 1
   |
   = note: `init` from trait: `fn(&'static kernel::prelude::CStr, &'static kernel::ThisModule) -> core::result::Result<Self, kernel::error::Error>`

error: aborting due to 1 previous error

And an equivalent error for ./samples/rust/rust_print.o

After commit c96b547:
rust: Addname argument to Module::init()
init needs a name argument. Since both rust samples were made
before that, they fail to compile.

After fix:

$ make CROSS_COMPILE="aarch64-linux-gnu-" ARCH=arm64 LLVM=1 ./samples/rust/rust_minimal.o
  CALL    scripts/checksyscalls.sh
  RUSTC [M] samples/rust/rust_minimal.o
$ make CROSS_COMPILE="aarch64-linux-gnu-" ARCH=arm64 LLVM=1 ./samples/rust/rust_print.o
  CALL    scripts/checksyscalls.sh
  RUSTC [M] samples/rust/rust_print.o