armv8: ls1028a: move FSL_LAYERSCAPE to kconfig

CONFIG_FSL_LAYERSCAPE is available in kconfig. There is no need to
define it per board; the ls1028a_common.h is really board dependent and
only fits to the NXP eval boards. Instead select CONFIG_FSL_LAYERSCAPE
when ARCH_LS1028A is selected.
Signed-off-by: Michael Walle <michael@walle.cc>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>

arch/arm/cpu/armv8/fsl-layerscape/Kconfig

@@ -23,6 +23,7 @@ config ARCH_LS1012A
 config ARCH_LS1028A
 	bool
 	select ARMV8_SET_SMPEN
+	select FSL_LAYERSCAPE
 	select FSL_LSCH3
 	select NXP_LSCH3_2
 	select SYS_FSL_HAS_CCI400

include/configs/ls1028a_common.h

@@ -7,7 +7,6 @@
 #define __L1028A_COMMON_H
 
 #define CONFIG_REMAKE_ELF
-#define CONFIG_FSL_LAYERSCAPE
 #define CONFIG_MP
 
 #include <asm/arch/stream_id_lsch3.h>