Current naming is confusing since it differs between GTP1 and GTP2. The GTP2 version is compatible to the naming in the data sheet. So I suggest to adjust the naming for  GPT1

I suggest to explicitely delcare a (say)  IMXRT_TMR_CH_t struct which collects the registers for a TMR  channel instead of implicitely defining this struct in the declaration of IMXRT_TMR_t.

This would allow for an easier definition of user classes modelling a TMR channel.
Not a big deal, could also do that mayself the class code but it would be more convenient if this would be done in imxrt.h

Moved from my flexio_t4 library.
Libary was updated to see if already defined before it now defines it.

The FlexIO registers are 32 bits, the masks were all setup for 16 bits so the high word of registers were not updated

I created a structure IMXRT_LPSPI_t
like what was done for UARTS.

I hopefully got all of the unused fields in properly to get the registers on the correct addresses.
Note: I did not update the other #define LPSPIn_ values but left them, likewise, I create a new define for each of the addresses.

That way we can double check I have everything properly aligned

Tempsense2 address correction and added analogreadaveraging code.

- comment SRC_GPR1..SRC_GPR10 (used by the ROM code)

Deleted a duplicate define: #define CCM_CBCMR_PERIPH_CLK2_SEL_MASK		((uint32_t)(0x03 << 12))
 and added tempmon registers