kernel: Add missing symbols to 4.19

Tested with apm82181 and ipq40xx minimal image versions.

Signed-off-by: Christian Lamparter <[email protected]>

target/linux/generic/config-4.19

@@ -1102,6 +1102,7 @@ CONFIG_DEBUG_KERNEL=y
 # CONFIG_DEBUG_PREEMPT is not set
 # CONFIG_DEBUG_RODATA is not set
 # CONFIG_DEBUG_RODATA_TEST is not set
+# CONFIG_DEBUG_RSEQ is not set
 # CONFIG_DEBUG_RT_MUTEXES is not set
 # CONFIG_DEBUG_RWSEMS is not set
 # CONFIG_DEBUG_SECTION_MISMATCH is not set