spi: dw: Remove Intel Thunder Bay SOC support

Remove Intel Thunder Bay specific code as the product got cancelled and
there are no end customers or users.

Signed-off-by: Nandhini Srikandan <[e-mail]>
Reviewed-by: Andy Shevchenko <[e-mail]>
Link: https://msgid.link/r/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

drivers/spi/spi-dw-mmio.c

···
 	{ .compatible = "renesas,rzn1-spi", .data = dw_spi_pssi_init},
 	{ .compatible = "snps,dwc-ssi-1.01a", .data = dw_spi_hssi_init},
 	{ .compatible = "intel,keembay-ssi", .data = dw_spi_intel_init},
-	{ .compatible = "intel,thunderbay-ssi", .data = dw_spi_intel_init},
 	{
 		.compatible = "intel,mountevans-imc-ssi",
 		.data = dw_spi_mountevans_imc_init,