stm32mp: remove the bootcount activation

Today the bootcount is not managed by the Linux kernel for STM32MP15 as
we don't have driver to update the used backup register in TAMP and the
recovery command still executes the normal bootcmd with
'altbootcmd=run bootcmd'.

So the bootcount feature is never used, the config CONFIG_BOOTCOUNT_LIMIT
and the associated environment variable 'altbootcmd' can be removed to
reduce the U-Boot size.

Each boards can re-enable this feature later in their defconfig, if it is
needed, with the expected backend, for example CONFIG_BOOTCOUNT_GENERIC
or CONFIG_BOOTCOUNT_ENV.

CC: Marek Vasut <marex@denx.de>
Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
diff --git a/arch/arm/mach-stm32mp/Kconfig b/arch/arm/mach-stm32mp/Kconfig
index 06ac349..1ed2aad 100644
--- a/arch/arm/mach-stm32mp/Kconfig
+++ b/arch/arm/mach-stm32mp/Kconfig
@@ -68,9 +68,7 @@
 config TARGET_ST_STM32MP15x
 	bool "STMicroelectronics STM32MP15x boards"
 	select STM32MP15x
-	imply BOOTCOUNT_LIMIT
 	imply BOOTSTAGE
-	imply CMD_BOOTCOUNT
 	imply CMD_BOOTSTAGE
 	imply CMD_CLS if CMD_BMP
 	imply DISABLE_CONSOLE
@@ -85,9 +83,7 @@
 config TARGET_MICROGEA_STM32MP1
 	bool "Engicam MicroGEA STM32MP1 SOM"
 	select STM32MP15x
-	imply BOOTCOUNT_LIMIT
 	imply BOOTSTAGE
-	imply CMD_BOOTCOUNT
 	imply CMD_BOOTSTAGE
 	imply CMD_CLS if CMD_BMP
 	imply DISABLE_CONSOLE
@@ -112,9 +108,7 @@
 config TARGET_ICORE_STM32MP1
 	bool "Engicam i.Core STM32MP1 SOM"
 	select STM32MP15x
-	imply BOOTCOUNT_LIMIT
 	imply BOOTSTAGE
-	imply CMD_BOOTCOUNT
 	imply CMD_BOOTSTAGE
 	imply CMD_CLS if CMD_BMP
 	imply DISABLE_CONSOLE
@@ -136,8 +130,6 @@
 config TARGET_DH_STM32MP1_PDK2
 	bool "DH STM32MP1 PDK2"
 	select STM32MP15x
-	imply BOOTCOUNT_LIMIT
-	imply CMD_BOOTCOUNT
 	help
 		Target the DH PDK2 development kit with STM32MP15x SoM.
 
diff --git a/include/configs/stm32mp15_common.h b/include/configs/stm32mp15_common.h
index 2bbc8de..175d546 100644
--- a/include/configs/stm32mp15_common.h
+++ b/include/configs/stm32mp15_common.h
@@ -137,7 +137,6 @@
 #endif
 
 #define STM32MP_EXTRA \
-	"altbootcmd=run bootcmd\0" \
 	"env_check=if env info -p -d -q; then env save; fi\0" \
 	"boot_net_usb_start=true\0"