ARM: davinci: remove unused cpuidle code

The cpuidle driver in mach-davinci is no longer used by anyone.
Remove it.

Link: https://lore.kernel.org/r/20240813082735.52402-1-brgl@bgdev.pl
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

Author: Bartosz Golaszewski

arch/arm/mach-davinci/Makefile

@@ -16,7 +16,6 @@ obj-$(CONFIG_ARCH_DAVINCI_DA850)	+= da850.o pdata-quirks.o
 obj-y					+= da8xx-dt.o
 
 # Power Management
-obj-$(CONFIG_CPU_IDLE)			+= cpuidle.o
 obj-$(CONFIG_HAVE_CLK)			+= pm_domain.o
 ifeq ($(CONFIG_SUSPEND),y)
 obj-$(CONFIG_ARCH_DAVINCI_DA850)	+= pm.o sleep.o

arch/arm/mach-davinci/cpuidle.c

@@ -21,7 +21,6 @@
 #include "common.h"
 #include "cputype.h"
 #include "da8xx.h"
-#include "cpuidle.h"
 #include "irqs.h"
 #include "sram.h"