kernel: Activate CONFIG_SYN_COOKIES for all targets

Some targets deactivated CONFIG_SYN_COOKIES, for unknown reasons, use
the default setting from the generic configuration which activates
CONFIG_SYN_COOKIES.

This should prevent SYN flooding.

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

target/linux/at91/config-4.9

@@ -482,7 +482,6 @@ CONFIG_SUSPEND_FREEZER=y
 CONFIG_SWIOTLB=y
 CONFIG_SWPHY=y
 # CONFIG_SWP_EMULATE is not set
-# CONFIG_SYN_COOKIES is not set
 CONFIG_SYSFS_SYSCALL=y
 CONFIG_SYS_SUPPORTS_APM_EMULATION=y
 # CONFIG_TCP_CONG_ADVANCED is not set

target/linux/gemini/config-4.14

@@ -398,7 +398,6 @@ CONFIG_SRCU=y
 CONFIG_SWIOTLB=y
 CONFIG_SWPHY=y
 CONFIG_SYNC_FILE=y
-# CONFIG_SYN_COOKIES is not set
 CONFIG_SYSFS_SYSCALL=y
 CONFIG_SYS_SUPPORTS_APM_EMULATION=y
 CONFIG_TASKS_RCU=y

target/linux/gemini/config-4.19

@@ -452,7 +452,6 @@ CONFIG_SRCU=y
 # CONFIG_STRIP_ASM_SYMS is not set
 CONFIG_SWPHY=y
 CONFIG_SYNC_FILE=y
-# CONFIG_SYN_COOKIES is not set
 CONFIG_SYSFS_SYSCALL=y
 CONFIG_SYS_SUPPORTS_APM_EMULATION=y
 CONFIG_TASKS_RCU=y

target/linux/layerscape/armv7/config-4.14

@@ -706,7 +706,6 @@ CONFIG_SWIOTLB=y
 CONFIG_SWPHY=y
 CONFIG_SWP_EMULATE=y
 CONFIG_SYNC_FILE=y
-# CONFIG_SYN_COOKIES is not set
 CONFIG_SYSFS_SYSCALL=y
 CONFIG_SYS_SUPPORTS_APM_EMULATION=y
 CONFIG_SYS_SUPPORTS_HUGETLBFS=y

target/linux/layerscape/armv8_32b/config-4.14

@@ -858,7 +858,6 @@ CONFIG_SWIOTLB=y
 CONFIG_SWPHY=y
 CONFIG_SWP_EMULATE=y
 CONFIG_SYNC_FILE=y
-# CONFIG_SYN_COOKIES is not set
 CONFIG_SYSFS_SYSCALL=y
 CONFIG_SYS_SUPPORTS_APM_EMULATION=y
 CONFIG_SYS_SUPPORTS_HUGETLBFS=y

target/linux/layerscape/armv8_64b/config-4.14

@@ -848,7 +848,6 @@ CONFIG_SWIOTLB=y
 CONFIG_SWIOTLB_XEN=y
 CONFIG_SWPHY=y
 CONFIG_SYNC_FILE=y
-# CONFIG_SYN_COOKIES is not set
 CONFIG_SYSCTL_EXCEPTION_TRACE=y
 CONFIG_SYSFS_SYSCALL=y
 CONFIG_SYS_HYPERVISOR=y

target/linux/zynq/config-4.14

@@ -574,7 +574,6 @@ CONFIG_SWIOTLB=y
 CONFIG_SWPHY=y
 CONFIG_SWP_EMULATE=y
 CONFIG_SYNC_FILE=y
-# CONFIG_SYN_COOKIES is not set
 CONFIG_SYSCTL_SYSCALL=y
 CONFIG_SYSFS_SYSCALL=y
 CONFIG_SYS_SUPPORTS_APM_EMULATION=y