kernel: Activate CONFIG_HARDENED_USERCOPY for all targets

This activates CONFIG_HARDENED_USERCOPY for the remaining targets. This
adds additional checks in the copy_from_user() and copy_to_user()
functions.

This was not activated for ARCHS38 before because of a bug in the Linux
kernel 5.4 till 5.14, which as fixed and is described here:
https://github.com/foss-for-synopsys-dwc-arc-processors/linux/issues/15

I do not know why this was deactivated for mt7629 and rockchip.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

target/linux/archs38/config-5.15

@@ -110,7 +110,6 @@ CONFIG_GPIO_GENERIC=y
 CONFIG_GPIO_SNPS_CREG=y
 CONFIG_GRACE_PERIOD=y
 CONFIG_HANDLE_DOMAIN_IRQ=y
-# CONFIG_HARDENED_USERCOPY is not set
 CONFIG_HAS_DMA=y
 CONFIG_HAS_IOMEM=y
 CONFIG_HZ_PERIODIC=y

target/linux/mediatek/mt7629/config-5.15

@@ -131,7 +131,6 @@ CONFIG_GENERIC_TIME_VSYSCALL=y
 CONFIG_GENERIC_VDSO_32=y
 CONFIG_GPIO_CDEV=y
 CONFIG_HANDLE_DOMAIN_IRQ=y
-# CONFIG_HARDENED_USERCOPY is not set
 CONFIG_HARDEN_BRANCH_PREDICTOR=y
 CONFIG_HARDIRQS_SW_RESEND=y
 CONFIG_HAS_DMA=y

target/linux/rockchip/armv8/config-5.10

@@ -249,7 +249,6 @@ CONFIG_GPIO_DWAPB=y
 CONFIG_GPIO_GENERIC=y
 CONFIG_GPIO_GENERIC_PLATFORM=y
 CONFIG_HANDLE_DOMAIN_IRQ=y
-# CONFIG_HARDENED_USERCOPY is not set
 CONFIG_HARDIRQS_SW_RESEND=y
 CONFIG_HAS_DMA=y
 CONFIG_HAS_IOMEM=y

target/linux/rockchip/armv8/config-5.15

@@ -248,7 +248,6 @@ CONFIG_GPIO_GENERIC=y
 CONFIG_GPIO_GENERIC_PLATFORM=y
 CONFIG_GPIO_ROCKCHIP=y
 CONFIG_HANDLE_DOMAIN_IRQ=y
-# CONFIG_HARDENED_USERCOPY is not set
 CONFIG_HARDIRQS_SW_RESEND=y
 CONFIG_HAS_DMA=y
 CONFIG_HAS_IOMEM=y