Update rp2040 pico-sdk to latest (1.5.1 with additional bugfixes)

[mikee47]

No description provided.

[what-the-diff]

PR Summary

• Modifications to array in cyw43_ctrl.c
  Changes have been made to the element values of the cyw43_async_event_name_table.

• Multiple changes in cyw43_ll.c
  Numerous changes across different functions namely sdio_transfer, sdio_enable_high_speed_4bit, cyw43_read_backplane_mem, cyw43_write_backplane, cyw43_download_resource cyw43_clm_load and cyw43_ll_wifi_on. These changes range from modifications to the function structures, variable assignments and also the logic of the functions.

• Function inclusion in cyw43_ll.c
  There's an inclusion of a new function, the cyw43_hal_ticks_us function as well as the buf array.

• **Constant Changes in cyw43_ll.c"
  Several constant values like CYW43_FLASH_BLOCK_SIZE and CLM_CHUNK_LEN have been modified.

• Array Inclusion in cyw43_ll.c
  An array by the name wifi_nvram_4343 has also been added in this file.

• Modifications to Constants in cyw43_ll.h
  The values of CYW43_EV_* constants have been modified.

• Changes in Subprojects
  The subprojects rp2040/pico-sdk and cyw43-driver have been updated with likely new features or fixes.

• Function modification in queue.c
  The atomic_set_bit function has been modified.

• Alterations in memmap_default.ld
  This file has undergone changes, although specific modifications were not noted.