fsl-layerscape: drop obsolete PPA secure firmware support

PPA was a secure firmware developed in-house which is no longer
supported and replaced by TF-A quite some years ago. Drop support
for it.

Signed-off-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
diff --git a/include/configs/ls1046a_common.h b/include/configs/ls1046a_common.h
index 38fb1d4..867b098 100644
--- a/include/configs/ls1046a_common.h
+++ b/include/configs/ls1046a_common.h
@@ -21,8 +21,7 @@
 	(defined(CONFIG_NAND_BOOT) || defined(CONFIG_QSPI_BOOT))
 #define SPL_NO_MMC
 #endif
-#if defined(CONFIG_SPL_BUILD)		&& \
-	!defined(CONFIG_SPL_FSL_LS_PPA)
+#if defined(CONFIG_SPL_BUILD)
 #define SPL_NO_IFC
 #endif