hwspinlock: u8500: delete driver

The U8500 platform was converted to DT around 2013 and is DT only
meanwhile. This driver has never been converted to a DT driver, so it
clearly hasn't been used since then. To ease upcoming refactoring in the
hwspinlock subsystem, remove this obsolete driver.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Linus Walleij <linusw@kernel.org>
Acked-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Link: https://lore.kernel.org/r/20260401071141.4718-2-wsa+renesas@sang-engineering.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>

Author: Wolfram Sang

MAINTAINERS

@@ -3158,7 +3158,6 @@ F:	drivers/clocksource/clksrc-dbx500-prcmu.c
 F:	drivers/dma/ste_dma40*
 F:	drivers/pmdomain/st/ste-ux500-pm-domain.c
 F:	drivers/gpio/gpio-nomadik.c
-F:	drivers/hwspinlock/u8500_hsem.c
 F:	drivers/i2c/busses/i2c-nomadik.c
 F:	drivers/iio/adc/ab8500-gpadc.c
 F:	drivers/mfd/ab8500*

arch/arm/configs/u8500_defconfig

@@ -148,7 +148,6 @@ CONFIG_RTC_DRV_PL031=y
 CONFIG_DMADEVICES=y
 CONFIG_STE_DMA40=y
 CONFIG_HWSPINLOCK=y
-CONFIG_HSEM_U8500=y
 CONFIG_EXTCON_FSA9480=y
 CONFIG_IIO=y
 CONFIG_IIO_SW_TRIGGER=y

drivers/hwspinlock/Kconfig

@@ -53,14 +53,4 @@ config HWSPINLOCK_SUN6I
 
 	  If unsure, say N.
 
-config HSEM_U8500
-	tristate "STE Hardware Semaphore functionality"
-	depends on ARCH_U8500 || COMPILE_TEST
-	help
-	  Say y here to support the STE Hardware Semaphore functionality, which
-	  provides a synchronisation mechanism for the various processor on the
-	  SoC.
-
-	  If unsure, say N.
-
 endif # HWSPINLOCK

drivers/hwspinlock/Makefile

@@ -9,4 +9,3 @@ obj-$(CONFIG_HWSPINLOCK_QCOM)		+= qcom_hwspinlock.o
 obj-$(CONFIG_HWSPINLOCK_SPRD)		+= sprd_hwspinlock.o
 obj-$(CONFIG_HWSPINLOCK_STM32)		+= stm32_hwspinlock.o
 obj-$(CONFIG_HWSPINLOCK_SUN6I)		+= sun6i_hwspinlock.o
-obj-$(CONFIG_HSEM_U8500)		+= u8500_hsem.o