remove CONFIG_ANDROID

The ANDROID config symbol is only used to guard the binder config
symbol and to inject completely random config changes.  Remove it
as it is obviously a bad idea.
Acked-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20220629150102.1582425-2-hch@lst.deSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/Makefile

@@ -176,7 +176,7 @@ obj-$(CONFIG_USB4)		+= thunderbolt/
 obj-$(CONFIG_CORESIGHT)		+= hwtracing/coresight/
 obj-y				+= hwtracing/intel_th/
 obj-$(CONFIG_STM)		+= hwtracing/stm/
-obj-$(CONFIG_ANDROID)		+= android/
+obj-y				+= android/
 obj-$(CONFIG_NVMEM)		+= nvmem/
 obj-$(CONFIG_FPGA)		+= fpga/
 obj-$(CONFIG_FSI)		+= fsi/

drivers/android/Kconfig

 # SPDX-License-Identifier: GPL-2.0
 menu "Android"
 
-config ANDROID
-	bool "Android Drivers"
-	help
-	  Enable support for various drivers needed on the Android platform
-
-if ANDROID
-
 config ANDROID_BINDER_IPC
 	bool "Android Binder IPC Driver"
 	depends on MMU
@@ -54,6 +47,4 @@ config ANDROID_BINDER_IPC_SELFTEST
 	  exhaustively with combinations of various buffer sizes and
 	  alignments.
 
-endif # if ANDROID
-
 endmenu

kernel/configs/android-base.config

@@ -7,7 +7,6 @@
 # CONFIG_OABI_COMPAT is not set
 # CONFIG_SYSVIPC is not set
 # CONFIG_USELIB is not set
-CONFIG_ANDROID=y
 CONFIG_ANDROID_BINDER_IPC=y
 CONFIG_ANDROID_BINDER_DEVICES=binder,hwbinder,vndbinder
 CONFIG_ANDROID_LOW_MEMORY_KILLER=y

kernel/rcu/Kconfig.debug

@@ -86,8 +86,7 @@ config RCU_EXP_CPU_STALL_TIMEOUT
 	int "Expedited RCU CPU stall timeout in milliseconds"
 	depends on RCU_STALL_COMMON
 	range 0 21000
-	default 20 if ANDROID
-	default 0 if !ANDROID
+	default 0
 	help
 	  If a given expedited RCU grace period extends more than the
 	  specified number of milliseconds, a CPU stall warning is printed.

tools/testing/selftests/filesystems/binderfs/config

-CONFIG_ANDROID=y
 CONFIG_ANDROID_BINDERFS=y
 CONFIG_ANDROID_BINDER_IPC=y

tools/testing/selftests/sync/config

 CONFIG_STAGING=y
-CONFIG_ANDROID=y
 CONFIG_SW_SYNC=y