drivers: spi_nrfx_spim: workaround for nRF52832 errata anomaly 58

See:
https://infocenter.nordicsemi.com/index.jsp?topic=%2Fstruct_nrf52%2Fstruct%2Fnrf52832_errata.html
https://infocenter.nordicsemi.com/pdf/nRF52832_Rev_3_Errata_v1.0.pdf



Code derived from the example PAN 58 workaround code.

Adds a new nRF SPIM Devicetree binding property called
anomaly-58-workaround that allows the workaround to be enabled
if required per SPIM instance.

Signed-off-by: Nick Ward <nick.ward@setec.com.au>