PWMSCALE Typo bug in some TMCXXXX_HW_Abstraction.h

For the TMC2209 IC, the definition for #PWMSCALE is presumably missing the underscore (line 49).

This definition is intended to be used in lines 296 and 299 with the underscore PWM_SCALE. This would also be consistent naming convention as PWM_AUTO.

I do not currently use any other TMC ICs, but if this change is approved then this typo could be present in other ICs.

Doing a quick search in the other ICs, using PWMSCALE is consistent in the initial definition, but the use in the associated *_FIELD defines is inconsistent.

For example:

Several ICs like the 2208, 2209, 2224, 2225, 2226, and 5160 define PWMSCALE but then use PWM_SCALE in the *_field definitions.
Several ICs like the 2300, 2240, and 5240 define PWMSCALE and use PWMSCALE (versus PWM_SCALE) in the *_field definitions.

[trinamic-ASU]

Thank you. Your PR have been merged.