spi: Drop unused efm32 bus driver

Support for this machine was just removed, so drop the now unused spi
bus driver, too.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20210114151630.128830-5-u.kleine-koenig@pengutronix.deSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/Kconfig

@@ -292,13 +292,6 @@ config SPI_DLN2
 	 This driver can also be built as a module.  If so, the module
 	 will be called spi-dln2.
 
-config SPI_EFM32
-	tristate "EFM32 SPI controller"
-	depends on OF && ARM && (ARCH_EFM32 || COMPILE_TEST)
-	select SPI_BITBANG
-	help
-	  Driver for the spi controller found on Energy Micro's EFM32 SoCs.
-
 config SPI_EP93XX
 	tristate "Cirrus Logic EP93xx SPI controller"
 	depends on ARCH_EP93XX || COMPILE_TEST

drivers/spi/Makefile

@@ -42,7 +42,6 @@ spi-dw-$(CONFIG_SPI_DW_DMA)		+= spi-dw-dma.o
 obj-$(CONFIG_SPI_DW_BT1)		+= spi-dw-bt1.o
 obj-$(CONFIG_SPI_DW_MMIO)		+= spi-dw-mmio.o
 obj-$(CONFIG_SPI_DW_PCI)		+= spi-dw-pci.o
-obj-$(CONFIG_SPI_EFM32)			+= spi-efm32.o
 obj-$(CONFIG_SPI_EP93XX)		+= spi-ep93xx.o
 obj-$(CONFIG_SPI_FALCON)		+= spi-falcon.o
 obj-$(CONFIG_SPI_FSI)			+= spi-fsi.o

include/linux/platform_data/efm32-spi.h

-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef __LINUX_PLATFORM_DATA_EFM32_SPI_H__
-#define __LINUX_PLATFORM_DATA_EFM32_SPI_H__
-
-#include <linux/types.h>
-
-/**
- * struct efm32_spi_pdata
- * @location: pinmux location for the I/O pins (to be written to the ROUTE
- * 	register)
- */
-struct efm32_spi_pdata {
-	u8 location;
-};
-#endif /* ifndef __LINUX_PLATFORM_DATA_EFM32_SPI_H__ */