arm target docs: small wording fixes

Author: jonathanpallant

src/doc/rustc/src/platform-support/arm-none-eabi.md

@@ -64,7 +64,7 @@ instructions.
 It is possible to tell Rust (or LLVM) that you have a specific model of Arm
 processor, using the [`-C target-cpu`][target-cpu] option. You can also control
 whether Rust (or LLVM) will include instructions that target optional hardware
-features, e.g. hardware floating point, or vector maths operations, using [`-C
+features, e.g. hardware floating-point, or Advanced SIMD operations, using [`-C
 target-feature`][target-feature].
 
 It is important to note that selecting a *target-cpu* will typically enable

src/doc/rustc/src/platform-support/thumbv8m.base-none-eabi.md

@@ -14,7 +14,7 @@ See [`arm-none-eabi`](arm-none-eabi.md) for information applicable to all
 
 This target uses the soft-float ABI: functions which take `f32` or `f64` as
 arguments will have those values packed into integer registers. This is the
-only option because there is no FPU support in [ARMv6-M].
+only option because there is no FPU support in [ARMv8-M] Baseline.
 
 [t32-isa]: https://developer.arm.com/Architectures/T32%20Instruction%20Set%20Architecture
 [ARMv8-M]: https://developer.arm.com/documentation/ddi0553/latest/