Update Rust crate cortex-m-rt to 0.7.4 - autoclosed

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
cortex-m-rt	dependencies	patch	0.7 -> 0.7.4

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Release Notes

rust-embedded/cortex-m (cortex-m-rt)

v0.7.4

Compare Source

v0.7.4 - 2021-12-31

Added

• Added support for additional DWT counters (#​349)
  • CPI counter
  • Exception overhead counter
  • LSU counter
  • Folded-instruction counter
• Added DWT.set_cycle_count (#​347).
• Added support for the Cortex-M7 TCM and cache access control registers.
  There is a feature cm7 to enable access to these (#​352).
• Add derives for serde, Hash, and PartialOrd to VectActive behind feature
  gates for host-platform use (#​363).
• Support host platforms besides x86_64 (#​369).
• Added delay::Delay::with_source, a constructor that lets you specify
  the SysTick clock source (#​374).

Fixed

• Fix incorrect AIRCR PRIGROUP mask (#​338, #​339).
• Fix nightly users of inline-asm breaking now that the asm macro is removed
  from the prelude (#​372).

Deprecated

• DWT::get_cycle_count has been deprecated in favor of DWT::cycle_count.
  This change was made for consistency with the C-GETTER convention. (#​349)

v0.7.3

Compare Source

[v0.7.3] - 2021-07-03

Fixed

• Fixed compilation for native targets on non-x86 host systems (#​336, #​337).

Added

• The Delay struct now offers direct delay_us() and delay_ms() methods
  without having to go through the embedded-hal traits (#​344).

v0.7.2

Compare Source

Fixed

• Fixed a bug where calling asm::delay() with an argument of 0 or 1 would
  underflow, leading to a very long delay.

v0.7.1

Compare Source

Added

• New assembly methods asm::semihosting_syscall, asm::bootstrap, and
  asm::bootload.

Deprecated

• msp::write has been deprecated in favor of asm::bootstrap. It was not
  possible to use msp::write without causing Undefined Behavior, so all
  existing users are encouraged to migrate.

Fixed

• Fixed a bug in asm::delay which could lead to incorrect codegen and
  infinite loops.
• Improved timing guarantees of asm::delay on multiple-issue CPU cores.
• Additional compiler fences added to inline assembly where necessary.
• Fixed DWARF debug information in pre-built assembly binaries.

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