RTEMS | bsp/arm/tms570: 4357 VIM vector table ECC not enabled/used (#5587)

[Avi Weiss (@thnkslprpt)]

Avi Weiss created an issue: https://gitlab.rtems.org/rtems/rtos/rtems/-/issues/5587



## Summary
See `bsp_interrupt_facility_initialize` in `bsps/arm/tms570/irq/irq.c`  
There is no enabling or other dealings with the ECC/SECDED feature for the 4357 variant.  

Confirmed this by reading out `ECCENA` on a TMS570LC43x Launchpad XL which  came out as `0x5` (disabled).  

This aligns with the TRM which confirms that ECC is disabled after reset until explicitly enabled:  
![image](/uploads/ac26da4d5adc9216a56321f9d8778ad9/image.png){width=723 height=67}  

## Expected behaviour
Enable `ECCENA` in the `ECCCTL` register.  

Will probably require adding some register definitions in `bsps/arm/tms570/include/bsp/ti_herc/reg_vim.h`

-- 
View it on GitLab: https://gitlab.rtems.org/rtems/rtos/rtems/-/issues/5587
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