latona: defconfig: reenabled selinux and removed specific selinux defconfig

Change-Id: I7f55b2f0401c203ba68994fb8b469eebf78036df
Signed-off-by: David Rodero <david@codiguiel.net>
Removed duplicated entries from block makefile

Change-Id: Ia65d2dd4b14c5c7ee8561c82e7e635c0cbcbe4bd
Signed-off-by: David Rodero <david@codiguiel.net>