rp235x_hal::rom_data: inconsistent usage of usize/u32

[jf-uu]

rp235x_hal::rom_data inconsistently accepts a u32 or a usize for size arguments:

rp-hal/rp235x-hal/src/rom_data.rs

Line 1258 in 38d28bd

unsafe fn explicit_buy(buffer: *mut u8, buffer_size: u32) -> i32 {

rp-hal/rp235x-hal/src/rom_data.rs

Line 1269 in 38d28bd

unsafe fn get_uf2_target_partition(workarea_base: *mut u8, workarea_size: usize, family_id: u32, partition_out: *mut u32) -> i32 {

The first 2 arguments to both of these are used as work area for the boot ROM. Is there a reason for this? The RP2350 datasheet just lists them as u32. I'm happy to open a PR to change them all to use usize (which is more convenient when passing a buffer's length as thing.len()).

[thejpster]

No reason. Any count of things in memory should be a usize in our API, even if we have to cast to a u32 to pass the value to the ROM.