[PATCH] rust: io: fix example in `register!` macro

[Link Mauve]

In this example, an u32 register is split in two u8 in big-endian order,
but the high byte is actually defined as taking nine bits instead of
eight.

This is completely inconsequential, as I expect most users will just
copy the bit ranges from their datasheets, but it doesn’t hurt to fix
that typo.

Signed-off-by: Link Mauve <linkmauve@xxxxxxxxxxxx>
---
 rust/kernel/io/register.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/rust/kernel/io/register.rs b/rust/kernel/io/register.rs
index f924c7c7c1db..66449377a0b7 100644
--- a/rust/kernel/io/register.rs
+++ b/rust/kernel/io/register.rs
@@ -448,7 +448,7 @@ fn into_io_op(self) -> (FixedRegisterLoc<T>, T) {
 ///
 /// register! {
 ///     FIXED_REG(u32) @ 0x100 {
-///         16:8 high_byte;
+///         15:8 high_byte;
 ///         7:0  low_byte;
 ///     }
 /// }
-- 
2.55.0