gemini: Make kernel text and rodata read-only

This is activate for all other targets except gemini, also activate it
there.

Signed-off-by: Hauke Mehrtens <[email protected]>

target/linux/gemini/config-4.14

@@ -391,8 +391,6 @@ CONFIG_SPI_MASTER=y
 CONFIG_SPLIT_PTLOCK_CPUS=999999
 CONFIG_SRCU=y
 # CONFIG_STAGING is not set
-# CONFIG_STRICT_KERNEL_RWX is not set
-# CONFIG_STRICT_MODULE_RWX is not set
 # CONFIG_STRIP_ASM_SYMS is not set
 CONFIG_SWIOTLB=y
 CONFIG_SWPHY=y

target/linux/gemini/config-4.19

@@ -446,8 +446,6 @@ CONFIG_SPI_MASTER=y
 CONFIG_SPLIT_PTLOCK_CPUS=999999
 CONFIG_SRCU=y
 # CONFIG_STAGING is not set
-# CONFIG_STRICT_KERNEL_RWX is not set
-# CONFIG_STRICT_MODULE_RWX is not set
 # CONFIG_STRIP_ASM_SYMS is not set
 CONFIG_SWPHY=y
 CONFIG_SYNC_FILE=y